Hello, usairbus01, your friend's longevity service may be an advantage to him.
Fractionals are a different ball game, but if your friend is looking for work, encourage him to apply. The hiring requirements vary from the Commercial airlines. Yes, he may miss the interaction with other flight attendants, but service on board is more detailed and you work with less passengers, I would encourage your friend to go to the website and take a look, if he doesn't apply someone else will therefore he may miss out on the chance of employment!
Merry Christmas and Happy New Year.
MissKittyKat