Windows eats itself slowly over time, and it requires reinstalling to right the ship. I don't know why this is the case, but it's been the case since the 95/98

Windows eats itself slowly over time, and it requires reinstalling to right the ship. I don't know why this is the case, but it's been the case since the 95/98 era atleast (I don't have experience previous to these). A reinstall isn't required, but it absolutely runs better once you do so. The only improvement I've seen is that generally it will take longer before windows needs a reinstall. It's possible you just don't realize how much performance/speed you've lost over time.