Sure, the DC-8s were a long time ago, but the 737-200s to GNV and TRI were after I was hired in 96. The problem was back when oil was cheap (after 9-11), some management types saw the cheap costs with RJs. They thought business people wanted "frequency" over "comfort." That turned out to be completely wrong, and the guy who decided this for this legacy went on to found Virgin America, WITHOUT RJs. Hmmmmmm. Maybe he learned something. The RJs were also never intended to fly 10 legs per day. They originally were corporate jets (CL-601 Challenger---just stretched), and now that they are up to their cycle limits (landings), they would have to go through very expensive checks, that probably would cost more than most of them are worth currently. High gas has made them very inefficient, and it looks like high gas may be here to stay for a while. It would be nice for pax to have a choice in departure times, but not at the expense of profits. This isn't Amtrak.
So, DC9s and A320s are going back to cities that once were flown exclusively by mainline, and then went to exclusively RJ. That is a huge shift in thinking, and one I think is better. People like the mainline planes better, the extra space, and the airline can spread out the costs and try to make a profit. That's good.
Bye Bye---General Lee