Recently, I recommended to a friend that basic vim/vi is worth learning because it’s a baseline that you can always trust will be there across different Linux systems.
They asked me what I used most on my home system, and the answer was emacs, but I was very clear that I was not recommending it. It’s a particular kind of person who finds themselves at home in emacs, and for everyone besides those people, selling them on emacs would feel like persuading them to do hard drugs.
Wise. If you don’t test your backups, you don’t have backups.