Every government and school meeting I've had to attend over the last two years is on Zoom. We tried to go with someone else but peer pressure made us get a contract with Zoom for all classes.
It also still can show more simultaneous "squares" of video than most (maybe not all anymore) of it's competitors.
Also it's atrocious UI and UX may still be better than MS Teams.
Google meet, and jitsi meet are both depressingly bad for this use case.
It's not my favourite piece of software, but for virtual teaching, it is head-and-shoulders above the competition.
Compared to google meet it all felt like a bad joke.