This is about the only time I'd be OK with those (otherwise obnoxious) popups you get in apps once they've updated version. If Jellyfin showed a "major changes"

This is about the only time I'd be OK with those (otherwise obnoxious) popups you get in apps once they've updated version. If Jellyfin showed a "major changes" popup when an admin logs in the dashboard after an update, they could perhaps include a special call-to-action button just for enabling the new feature. Of course, they could also have a help documentation page for telling upgraders how to enable the feature, and link it in the announcement. After all, the announcement is how I found out there was even an upgrade to apply. Nonetheless, I'm just glad that the upgrade didn't break anything! I think it's also the right choice to keep existing metadata as-is, and leave it to the admin to turn on options, plugins, etc. and refresh it at their leisure to pick up these new code paths.