That's personally not enough for many remote companies. So if we're going to have to have Zoom on our machines anyway (to handle an all-company meeting), why not just use it for the rest?
It's more of a large-scale broadcast situation. Think of large corporate town halls, town council meetings, etc.
Giving all the data to zoom probably means also giving it to most US law enforcement agencies (should they request it), that would be a big no no for me.
Oh, and you can also do sub-rooms with Zoom, which has some applications in these types of meetings.
that is called broadcast media -- it was actually better thirty years ago than it is now. If you want conversation then you make a panel, and have a single microphone for the rest.
If something they said in the main presentation was missing important details that you need to do you work, why do you need to wait days/weeks for them to gather all the questions, find all the answers, and publish a video, when they could just answer it live in a few seconds?!
"At that scale there'll be no interactivity during the meeting anyway."
And I suspect that for most people -- including me -- Zoom accounts are "effectively unlimited". I wouldn't expect that many people to attend one of my meetings. The Internal Events team have licenses that allow for more attendees; I have a 500 attendee limit and I doubt I've ever gone above 50.