

The right answer is,
Debian if they just use web browsers and basic office apps.
Fedora if they use do the same but also use recent hardware that needs a newer kernel
Bazzite if they are a casual gamer and you want to make sure her sims still work easily
Cachy if she’s a nerd and plays a lot of higher end games.
All with kde of course
Don’t forget if a previously popular application starts to become unpopular its typically for a good reason! So watching downward trends can also clue you into issues or problems you would not have other wise known.
People dislike change so it takes something decently serious to actually halt momentum.