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.

I think what they mean is that things like Traefix, arr, et al are means to an end. The ideal situation is that you don't need to touch them after they're set up. Jellyfin, on the other hand, is something you actively sign into and use