well since 1990 i've only ever had one macintosh, either my own or one i work on at work, go bad on me. that was my beloved g3 powerbook, which one day just died after a month with a dicky power supply interface. it was second hand (so no idea how it was treated), had been with me to australia and back and worked well even when bits started to fall off.
i also have a fully functional macintosh classic (circa 1989) and a 1st gen powerbook which still boots, although the hd has bitten the dust (bought as dead off
ebay).
not trying to disprove anything twg has posted, but included for balence.
you might conclude that i'm easier on the hardware than twg though.