The main reason that finally pushed me to move over was that Plex works local only (no internet connection) for only so long and then you are done for without a beacon/login home I guess. Dumbest "feature" ever but I guess I get why they do it.

We had our power and internet go out for an extended amount of time earlier this year and shortly after I converted us over to Jellyfin vs Plex. Quite easy and painless setup. Mostly just recreated my libraries in Jellyfin and good to go.