It has centralised features like proprietary user sharing (which is neat but still), arbitrary limits like device limits, the ability to transcode using your server's hardware, and other stuff that Emby/Jellyfin users have as standard. So we generally see the restrictions as taking power and ownership away from our own media/hardware.

And any cool premium Plex features like merging multiple servers into one UI get adopted and ported into Emby/Jellyfin pretty damn quickly