Not really. It's been proven time and time again that what could be a quick upgrade at one place could turn around and be a 10 year upgrade by the time you get on property. Upgrade time is a bit of a misnomer because it assumes that everything will continue along the same track it is now. When has ANYTHING in this industry ever remained static for a long period of time (6+ months).

While people chose their airline for a variety of reasons, upgrade time is one of them, most people tend to do it for quality of life reasons.

Regionals have become less of a stepping stone and more of a base camp for many. Possibly moving on but also possible to take high quality of life over paycheck.