I guess the youngsters probably go through the phase of travelling and living dirt cheap and then if/when they make it big, cash big on the perks of success. Didn't Nadal say that he still travels coach though? Must say that with the best players enjoying a completely different lifestyle, those struggling are forced to upgrade to make up those small margins that make a difference at the highest level. Sure, maybe a noiseless AC is not a deal-breaker, but when you hover around the fringes of the top 50, you probably think it had everything to do with your 3rd set tiebreaker loss
Should also add Stakhovsky's interview from a few months ago. Also very interesting, his is a starker picture than even this one.