I like the idea of being able to fix my gear if I'm away on vacation or there's no apple store around. In fact, I'm overall a big fan of repairability because I'm a bit of a tinkerer.
But if it's a work machine? Then I'd rather have a replacement on standby- and Apples time capsule/time machine stuff works better than other backup/restore systems I've used.. replacing a machine is a 2hr process if you have something usable in stock.
Eitherway: I work in Europe, so these machines literally cost more than a monthly salary, it's cheaper for the company to have me sit on my hands for a week than to have a spare laptop for me.