Windows 95 let installers trash its files then fixed the mess behind their backs
(www.theregister.com)
Oh, I'd actually forgotten how flaky 3.5" floppies were. That's very true.
A 5.25" you could probably send in a letter and stick the letter on a fridge with a magnet so your remember to mail it and it would still work when it arrived.
Well, maybe not, but it was quite a difference.