>>105893544
Before the advent of Ryzen and very recent Intel CPUs (13th/14th gen), CPUs where about as close to bullet proof as you could reasonably ask for.
Not to say CPUs never degraded but it usually very extreme cases like certain boards overvolting CPUs (eg Asus HEDT boards) or just OCed to death CPUs in general.
Generally if you weren't OCing, you never doubted the CPU when you did have an issue with system instability, it was literally anything else.

Kinda makes me weep at how problematic anything can be nowadays. You can just use systems as intended with zero OC (not even XMP/Expo) and have CPUs degrade.