Reinstall Windows or not ?

I wanted to gather some opinions about this. On almost every thread on forums like this one there is someone suggesting to do a Windows fresh install, whatever the problem is. I have been running the same Windows install for years, throughout many different components and honestly, I have never experienced any serious issues. I think my computer is currently doing great. Performances are on par with what the online reviews say I should get with my hardware (benchmarks are either on the average . I do experience some occasional micro-stuttering in demanding games but I'm not the only one and I think this is normal.