Random old stuff is available via Windows update. You’d be hard pressed to not have it just pop up and work.
Maybe for some old serial/parallel stuff you would have issues, but for anything USB? It’s gonna be on Windows update. The days of searching the internet for random drivers mostly died with Windows XP and pretty much completely died with Windows 7.
And that’s the rub. You have to very specifically choose your hardware for Linux. Or at least you had to back then. It’s not quite so bad now, but back then it was a real showstopper. Especially broadcom. That caused me no end of issues back in the day.