I’ve been using Plex for a very long time (shared with several users) and finally got my dad onboard from MediaPortal.
The one feature he mentioned was missing (and I forgot about) is TV Series air status.
He misses (and I do too, now!)
show ended / currently running
show on break
next episode air date
These were all available using the MPTV Series(IMDb source) plugin on MediaPortal
It would be great to see this feature come through to Plex