Stop downvoting OP because you don't remember PCs before 2000/XP. Those either didn't have different users or, in the case of windows 95 and 98, they were essentially pointless.
For the record: I don't remember my family having different accounts on our home computer as a kid.
Windows didn't properly support multi-users before Windows 10 anyway.
Properly as in "even my mom can use it". You could do it in earlier versions, but the UX wasn't exactly smooth if you had multiple users you needed to switch between.
Um, what? User switching in Windows 10 works exactly like it worked in 7, where it worked exactly like it worked in XP. Start -> Log Out -> Select another user and log in. Am I misremembering?
For the record: I don't remember my family having different accounts on our home computer as a kid.