Every month or three when I login to the web interface there's Some New Thing which I need to disable.
Recently I needed a 100% offline-capable media player (and while Plex would probably work, it's not 100% reliable) and tried with Kodi.
It's a very unfluid experience, requiring multiple plugins and a setup process which was complicated even for me. It wasn't terrible, and it did work and I'm glad it exists but it's not something I would ever use on a daily basis, Plex just works better.
I'll admit I haven't tried Emby or Jellyfin (yet), and, I'm sure I will some day. Plex will probably add something which is truly objectionable or otherwise not disableable and I'll be compelled to switch but for now I'll stick with the fluid experience, even if it requires me to occasionally disable their new "features".