Doesn't everyone just have a collection of apps you need and stick to those? I can't even remember when I bought an App. Even free apps only get downloaded when absolutely needed.
Indeed, that is why anyone with a clue wouldn't make important (hell, any... ) devices on a Cloud Service. I, and I hope nobody with a clue, wouldn't accept a firewall that is cloud dependent.
Support? I use Debian. I do my own support and use "the Internet" for that.
My SteamBox is literally Debian 11, booting into a very lightweight DE, autostarting the Steam client in Big Picture mode... all of the info to do that, is available online.