Not to mention the frequency/quality of seat upgrades, as well as the exclusivity of their lounges. For the first ~30 years of my life I was nearly exclusively

Not to mention the frequency/quality of seat upgrades, as well as the exclusivity of their lounges. For the first ~30 years of my life I was nearly exclusively an United flyer (passed down from parents who traveled for business extensively and were based near an United hub), yet even I have realized that it's just a game of where I can get the lowest cost / highest roi now, since there's just no rewards for my loyalty.