Not helpful I know, but my Amiga experience has always been excellent. My A500 is 14 years old (still working, despite being hacked to pieces and resprayed), and my A1200 is 10 years old (still working, despite being hacked to pieces, expanded dubiously, and resprayed, not that there's much case left to appreciate the respray)
I couldn't say if my PC's would be that enduring, none of the parts stay in there long enough to find out. I suspect however, that my old Amigas are likely to run another 10 years (maybe because they'll get used only once in a blue moon for nostalgic purposes, or because WinUAE won't play ball with a particular game)