We started using BigBlueButton at the the University. I tried to teach and there is nothing in it that is specifically lecture focused, but if you just use it as videoconferencing tool with all microphones muted, it does the job for a one-way communication tool. Once students start asking questions it is too limited. The chat clutters soon, the option for raising hands or changing status is useless with large groups. I'd say that the whole interface is useful only for smaller groups up to 10 persons, definitely not above 100 persons.

I have not tried Zoom or Jitsi Meet in such settings and can't compare. They both have some useful options and slightly more options than Big Blue Button (like the Youtube streaming in Jitsi Meet that will save bandwidth).