Granted, but the presence of those files does not slow down the system significantly. With leftover registry keys, you pay the price until you install the system from scratch.
(Windows might have improved the registry handling code since Windows 95/98, I think it's not quite as bad these days... but that might also have to due with computers being much faster than 20 years ago.)
(Windows might have improved the registry handling code since Windows 95/98, I think it's not quite as bad these days... but that might also have to due with computers being much faster than 20 years ago.)