For example, the default audio setting when you sign in to the web video client is to connect using PHONE AUDIO. In case you figure out how to click the tab to use computer audio...it breaks down a couple of time in asking for browser permissions (camera, mic). It is unusually bad for something that is supposed to be that good.
there are all these articles about the comparisons - https://webrtchacks.com/zoom-avoids-using-webrtc/
hangouts still rules when it comes to web based video conferencing. And for countries with massive linux based usage (like India), Zoom is not a very viable option.
also, does it work with mobile apps ?