I am a huge Plex power user; watching something at least once a day.

Unfortunately, Plex is a bit of a mess these days - constantly pushing Live TV on us, requiring internet access to access local media (this is a killer whenever internet goes down), overly complex, clunky remote access (altho this is much better these days). But it still isn't bad enough to make me try and migrate. I love my local setup (Sonarr and a custom app for movies as Radarr is OTT for the amount of movies we watch) and Plex is very polished (compared to the alternatives) but I do wonder how much longer it will be around.