I need a distro that is stable with a particular need to set up zero input automatic updates. If an update asks for a password or needs user interaction in basically any way it simply won’t get done. All he needs is a reliable platform for browsing the web. I am replacing an Ubuntu system that has apparently just stopped working (I have not had a chance to examine it yet) after years and years of not getting proper updates after he forgot his password.
Something like Bazzite is intriguing because of it’s locked down environment although he is very much not a gamer. Is there something locked down like Bazzite but with long term LTS release cycle?
I think more important than which distro to choose is you setting up remote access for yourself. Tailscale and maybe rust desk or something would be a good idea. Or if you want to go further a vpn connection to a KVM device, some of them support being able to wire into the power button so you have full control. I would also have their account info in your password manager. Then you don’t need them to remember anything because you can do it when needed.