Citing an airline for longevity is a bit disingenuous. I’m not sure how it works with support staff, but aircraft crew have contract structures that so heavily

Citing an airline for longevity is a bit disingenuous. I’m not sure how it works with support staff, but aircraft crew have contract structures that so heavily favor seniority that most pilots and FAs will never leave a major willingly during their career. Your observation, to me, seems more like: tech companies reward new employees over old, airlines do the extreme opposite.