I use Emby, only because a few friends did and recommended it. I'd probably switch ti something more secure and/or open source given the right push.
I’m getting increasingly frustrated at just how badly Plex behaves for home set ups. Which is the entire point of installing something like Plex.
Most annoying still, I’ve even paid for their premium products in the hope that it would make things behave better and it did not.
The only reason these security incidents happen is because Plex try to extort home users. There isn’t any other compelling reason to have your details on their database with credentials to active installs.
Thanks to the centralized Plex account, we can share our libraries with each other in a few clicks.
You can do the same if you don't have a server also, basically being a member of various Plex server and accessing everything through a single account and interface.
Sure, requiring an account if all you want to do is being the single user accessing your own instance is useless, and if it's your usecase, then Plex is not the right tool for you.
I tried Plex, Emby and Jellyfin, but I staid with Plex because of this easy sharing feature.