BlameXeno

Yep! 4980HQ in my mid-2015 MBP has been kicking for ~7 years now, under most reasonable load it sits at 95-99C constantly. Tis within Intel's thermal limits still and it isn't pulling high current through the chip (AFAIK high current is the killer, not pure voltage or temps) so it's fine. 

Most (especially old) of laptop CPU are running at that temp btw around 90-100c.
The motherboard usually shutdown when cpu temp reach its critical temp, so when yours still running means its still ok.

I mean, it's still technically in spec for the CPU, Ryzen 2000/3000 series generally had a TJmax of a out 105C, so the best analogy I can give you is driving a manual and revving our to the red line in every shift; technically within acceptable operating conditions, but mechanically abusive. Heat as a result of voltage does degrade ICs so it may have had some excessive premature wear, but probably taking it from 14 yrs of service to like 13.5.

i've had a core2duo live at 95°c for just about 6 years of usage, and it's still fine.
neighbor's 4770k has lived an undefined amount of time (weeks-ish) without a heatsink, because we all learned a stock cooler can fall off somehow... still fine.
 
killed performance? no, not a thing.
 
last i checked, it's not temperature that caused wear, but voltage. and thermal throttling means less voltage. so in a weird way it may actually be the opposite.
 
also.. a note on cpu lifespan.. yes, they degrade from voltage, which shortens lifespan, but what is the lifespan to begin with?

this hypothetical person will have to see.
(its possible the chip had some degradation but thats technically its functioning limit soo)