You can run i3 inside XFCE on a per user basis, but convincing my wife/kids to swap users when they need the computer for “just a second”…

I just take the win that they are on Linux and use a shared account.

XFCE. I also like tiling WMs, but I often have to share computers and they are too unintuitive for the rest of the family.

Probably because of what happened to CentOS. Who owns the Fedora trademark? How independent is Fedora really?

I am not saying anyone should avoid Fedora, I can just understand why someone would.

C or C++, specifically with the use of compiler explorer so you can get a feel for how code actually runs.

Common Lisp or Haskell to get a taste of something really different.