RJs are not "different" from any other airliner. When operated correctly they can make money. So can a 747 when it is operated correctly.
There seem to be two major problems associated with the inability to make money. 1) The legacy airlines don't know (in today's market) how to operate their airliners profitably, and that is true whether they are 737s, 747's or anything in between. 2) The legacy airlines never had a clue, in any market, how to operate small airliners like the RJ and have made a total mess of it. In both cases they operate on the concept of "mraket share" and that can't work in a deregulated system of low fares. The only thing that business concept produces is excess capacity, and that's where we are.
The "fee-for-departure" concept, invented by the major airlines, is mostly responsible for the inability of the RJ to "make money". Once that system was forced upon the regional airlines by the major airlines, the concept of why RJs existed in the first place was completely destroyed. As a result, a very profitable platform became unprofitable in a hurry.
First there was over expansion. Too many RJs were added to the various fleets, at the direction of the legacy carriers. Second they were being sent to places they were never intended to serve for reasons that included no logic at all; again at the direction of the legacy carriers. "Market share" at any cost is a recepie for failure, and they are all failing, with very rare exception.
The big bosses at the legacy airlines couldn't operate their own aircraft successfully and they had no idea whatever as to how to operate RJs. However, "fee-for-departure" gave them the "right" to make the decisions and they did. They ordered their feeders and subsidiaries to buy aircraft that they did not need and to operate them in markets where they were not needed, and to continue to do so, even when they couldn't make a nickle. They "paid" to fly them empty if necessary. This resulted in "book profits" at the regionals that didn't really exist, and huge losses at the majors who were footing the bill.
When the revenue sharing concept was in place the RJ was a cash cow. It only went where it was needed and it NEVER kept going there if it was loosing money. The small carriers (like Comair) didn't buy airplanes that they didn't need. When their so-called "partners" (like Delta) said we want you to fly from A to B, and that route couldn't produce the revenue, the regional said "no thanks". When the major said we want you to feed flight 300 by flying from B to C and the revenue share was not enough to cover the cost, the regional said NO, we can't do that. The majors didn't like the fact that they could not "control" where the RJ went or when it went, so they forced them to give up the revenue sharing and went to the "fee-for-departure" idea. This gave them the "control" that they wanted but it also produced an ever increasing "loss" for the RJ in what was now an artificial system. The "control" that the legacy carriers demanded and got was also a formula for red ink.
The so-called "failure of the RJ" is in fact induced by the mismanagement of the legacy carriers. It took Delta all of 4 years to change Comair from the most profitable airline in the country to a money losing albatross. If Delta hadn't forced (and I mean literally) Comair into fee-for-departure by buying it, Comair would not be as "big" as it is and it would not be going to many of the places it now serves, but it would be making money. Why? Because its management knew how to run a "low cost carrier" operating RJs, whereas Delta management had no clue and still doesn't.
The same principles apply to the LCC's, which do make money. They are niche carriers that are not trying to be all things, to all people, all of the time. SWA, although it is now virtually a legacy carrier, has always made money. It goes only to the right places, at the right times, with the right equipment. So do Air Tran and Jet Blue. They just don't go where they can't make money with the equipment they operate.
FlyI is not a good example of why RJs can't make money. They let themselves get boxed into a scenario of continuing to go to the same places they served as a UAL feeder, with the wrong airplane and they didn't get their "right" airplanes in time. A CL 200 can't compete in a market that requires a B-717 or an A-319. "Feed" is helpful but it was not the purpose of the RJ. If you have nothing to "feed" but you have a fleet of airplanes whose only purpose was "feed", you can't make it until you get out of that mold. FlyI's problem wasn't really their airplane, it was their timing. They were forced to make the move (by UAL) at the wrong time and they didn't have enough capital to adjust to a completely new way of doing buisness. In reality, they were among the first to buy off on the "fee-for-departure" idea. Therefore, when there was no one left to pay the fee they were unprepared to go it alone. In other words, I'm saying that ACA was based on a false premise to begin with (FFD) and tried to perpetuate it by serving markets that had never generated enough revenue to support their operation.
Comair never did that and that is why the airline was "bought" by Delta. It happened because Comair management refused to accept the concept of "fee-for-departure", so Delta bought the airline, imposed the system, and destroyed it in the process.
If SWA, Air Tran, or JetBlue, were trying to do what Delta does in the way that Delta does it, they too would be loosing buckets of money. Comair is loosing money because its parent company, which is also loosing not only money but the entire farm, forces it to do so. Business decisions are not made at Comair, they are made at Delta and they have been, in the majority, all wrong ever since Delta purchased the company.
The RJ isn't the problem. The problem is the people making the decisions. To keep it simple, they don't know what they're doing and the proof of that pudding is the pot.
Skywest currently "makes money" or so it is believed. The truth is that if UAL and DAL no longer "paid" Skywest to fly, they would be no better off than FlyI and it wouldn't take long for their few bucks to dissappear. Their "business plan", like all the other regionals, is not of their own making. They go where they are told to go and they are paid for doing it, whether or not that route is a money maker. That's not a business plan, it's a phony charade. The product of fee-for-departure. Over capacity subsidized by two bankrupt major airlines. That's not a recepie for "success". Take away either of those to bankrupt "parents" and Skywest will go broke in a hurry.
The same can be said of Express Jet, American Eagle, Republic, and all the other "feeders", including the "low cost" Mesa. All of it rides on the fee-for-departure bubble and is not viable on its own. Those companies would not have expanded as they have in a revenue-sharing world. In fact many of them would not even exist or they would be like Great Lakes. Pinnacle and Mesaba wouldn't have any "jets" at all if they were not purchased by NWA.
The worst thing that ever happend to Comair was its acquisition by Delta Air Lines. The same thing applies to ASA, although to a lesser degree since they were always totally dependent on Delta feed. When it was purchased, Comair was not totally dependent on Delta feed. I'm not saying it would have emerged as a giant by any means. However, I am saying that it certainly would not be where it is today.
The current situation is not the fault of the RJ, it is the fault of Delta Air Lines and in a similar fashion that of the other legacy carriers. The "market share" concept, which every legacy carrier embraces, is a failure and so is every legacy carrier. with the possible exception of CAL. The people that are making money don't do it on the basis of market share. They serve those markets where there is a need for the sevice they provide and few if any other places. The right airplane, in the right market, at the right time, makes money, even when the price of a ticket is far lower than it ought to be.
Common sense should tell you that you don't fly a 747 in a market that only needs a 737. It should also tell you that you don't fly and RJ in a market that needs a 737 or that needs no service at all. When the revenue doesn't support the operation you don't go there. It's really not rocket science. Even WalMart doesn't put a super center in an isolated community of 5,000 people.
The only thing wrong with the RJ sits in the corporate headquarters of every legacy airline.