I haven't had a power supply fail since my Tandy 1000, and that must have been fifteen years ago. And yes, I've purchased several computers in recent years. I seem to go through so many CPU fans that I can a spare one on hand nowdays. :(
knock on wood Of course you know what's going to happen now; my power supply is going to go belly up within the week. Especially since it's a new system that makes more demands on a power supply.