There's PLENTY of reasons to go to UPS as a thirtysomething beyond money - scheduling (PBS or rather lack thereof), health care, vacation, retirement (deferred money), domiciles, and a retirement bubble that is somewhat delayed compared to legacies but is looming all the same. There's also, for the first time in a long time, growth to the airline in terms of airframes and pilots.
For all the people who would steer people away from here to "better" jobs, there doesn't seem to be much attrition from people here bailing to Delta, United, AA or SWA like there was in the 90s....and "golden handcuffs"/"career V1" seems like a too-convenient excuse.