I stopped doing it around Windows 7 and have not really seen an issue. I have Windows 10 installations that date back to the original Windows 10 release (and have been updated with Windows Update all the way up to the current) and they are running perfectly fine.
That being said, I feel like I install much less software than I used to. They used to hand out CDs with computer magazines that were basically dumps of random quality freeware/shareware. The amount of registry items and other such crap that kind of software left lying around is probably a large reason why a re-format was required so often.
That being said, I feel like I install much less software than I used to. They used to hand out CDs with computer magazines that were basically dumps of random quality freeware/shareware. The amount of registry items and other such crap that kind of software left lying around is probably a large reason why a re-format was required so often.