Now that all major browsers support WebRTC [1] why isn’t it used more for video calls instead of proprietary solutions from Google, Microsoft, Zoom, etc.? Are t

Now that all major browsers support WebRTC [1] why isn’t it used more for video calls instead of proprietary solutions from Google, Microsoft, Zoom, etc.? Are there security flaws or ease of use barriers that prevent wider adoption? Is it simply lack of marketing/awareness? [1]: https://caniuse.com/#feat=rtcpeerconnection https://caniuse.com/#feat=rtcpeerconnection