I’ve been self-hosting since before docker and containers were a thing, and even though Nextcloud kinda pushes their container images these days, I still refuse to use them, and use the community archive releases or web installer when reconfiguring my system or setting up a new system to migrate to. Maybe it’s just Nextcloud and the other software I use, or maybe it’s just that I’m not really trying to build scalable server infrastructure with a lot of users, but I generally find that docker causes more problems than it solves, and it does my head in when I see projects that recommend containers as the primary suggested install method.

Totally agree with your assessment of the plugins/apps systems. Feels like you need to stick to official “apps” and hope they don’t get abandoned to have anything close to a good experience because even minor updates can break all the 3rd party apps because of a compatibility check, where you end up waiting for the app developer to release an “update” that only changes the version compatibility number.