Windows XP was great, nothing improved since then. I'm OKish with Win10. My motto for these things is if it aint broken don't try to fix it.
Same thing, I like to use the old Office versions, now at work I got 365, nothing is better, well perhaps one tiny thing. I can join Teams meetings without opening the calendar invite, there is a tiny link in the calendar to the meeting, that was actually an improvement! Otherwise things just moved around which annoys me and I need to disable a lot of stupid functionality which is auto enabled. Goal is always to make it work like the old version did. Can't fully get there.