Also answered here: https://lemmy.dbzer0.com/comment/27309703

For example, why Jellyfin over any of the *arrs

Don't take it the wrong way, the *arrs are an awesome ecosystem and tool. Very cool integration and administration.
But I could life without or replace them. Things like Jellyfin, immich, homeassistant are more integral in the sense of usage and replacing them would be a whole ordeal I would ideally like to avoid.