I've owned an MK3 since 2018, since then some defects have started to appear (the LCD has a contrast blob at the center, and I cracked the X-axis stepper bracket), but nothing that prevents the printer doing its occasional job.

I print mostly functional parts (home repairs & improvement, prototypes), and while I could have printed a fix for the broken part, the prospect of taking the whole thing apart (as well as for an upgrade to an S+) doesn't appeal to me.