Well I've done most of those except for using an immutable distro, and quite honestly have zero interest in running one.
Just this past year I've setup a media server using a bunch of servers I nabbed from work, did unraid because I've been toying with the unraid idea for years. Learned and fell in love with Docker. I avoided it like the plague for the better part of a decade. Now I run damn near everything in docker containers. Started using home assistant quite recently actually, my wife got annoyed with the heavily sanitized results she was getting with Gemini for Google Home. So I setup M5Stack ATOM Lite ESP32's around the house acting as microphones that I then use with home assistant to ferry the query to the Anthropic API and the result to the nearest Google Home device. It's a work in progress, but happy with the results