If you think webrtc is a replacement for zoom, then I don't think you have seen what many people are using zoom for. I am unaware of any webrtc implementation that can handle 100 people on a video call. Much less 1,000 or 5,000.
Once you get passed a dozen or so video call users in the same meeting, your options diminish quite a bit. I'm not saying zoom is the only option, but there aren't just tons of easy to use options that do that well.
Once you get passed a dozen or so video call users in the same meeting, your options diminish quite a bit. I'm not saying zoom is the only option, but there aren't just tons of easy to use options that do that well.