> If a $600 Mac lasts 5 years and still worth $150 and another machine loses all its value in six months (...)

Your hypothetical scenario is so absurd you didn't even noticed your catastrophical scenario falls well within any warranty period.

In the meantime, I own cheap miniPCs that I used as daily drivers, and they soldier on for years.

I mean, do you really believe that NUCs from Intel and AMD will simply fall apart if they don't have an Apple sticker on them?