Cool!My old 4770k is still going well, I kept it liquid cooled though. Still upgraded, but I could probably put it back together...
These modern PCs can basically live until the caps blow on the mobo or you really fry em with heat/powerspikes.
The worst thing one can do to an old PC is to remove the mobo from the case. With age, heat, and the weight of the cooler, they deform slightly, and when you release the pressure by unscrewing it, they bend back and crack lines in the PCB. Second worst thing, and way more common yet rarely as destructive, for the same reason is removing a big ass heavy cooler after years of it pulling on the mobo.