Sounds like you might be the perfect audience for consoles then. And here's the good news, that's the same audience SteamOS and Bazzite targets.

I am/was a big PC enthusiast but could no longer keep up with all the stuff due to real-life, eventually even gave up gaming for a few years as I just did not have the time.

The Nintendo Switch bought me back into (limited) gaming. I liked that I could just play from anywhere in short bursts, or could just hook it up to my TV and pick up the controller for longer sessions. The best part, I never had to worry about updates breaking things, or doing system maintenance - I could just power it on and jump straight into gaming. But I still missed my old PC games, especially playing games like Diablo II and Age of Empires.

When the Steam Deck came along, it changed everything. Well, technically I didn't get the Deck, I got a GPD Win Mini instead, and installed Bazzite on to it... but same thing. I get the same convenience as I had with the Switch, except now I had the added advantage of being able to play all my PC games (yes, all of them. No, I don't play games with nasty kernel anticheats).

Regarding your concern about Bazzite completely disappearing, the good news it it doesn't really matter. Since everything you customised lives on your home drive, all you need to do is backup your home drive, and that backs up everything you'd care about. You can use this same backup in Windows (Steam allows you to easily import a library from a different drive/folder) and your Pictures/Documents etc are basically the same folder layout as Windows. I actually ended up setting a triple-boot setup of Windows, Bazzite and CachyOS on my handheld, and they all point to the same Steam Library, same Documents etc. So not only do I have tripe redundancy, it shows how portable and migratable this stuff is.