Unlike Jitsi it also automatically throttles FPS, provides shared note-taking, moderation tools and recording.

and saves every session for some weeks on the server by default. Even when not recorded.

https://github.com/bigbluebutton/bigbluebutton/issues/9202

This is (very unfortunately) true, and I honestly don't know people get it to work in larger school implementations. The idea behind BigBlueButton is spot on and ultimately I hope another FOSS tool can help to fill this void