This looks great to be honest to build collaborative slide decks. But the one thing I’m seeing in recent times is that every product is building their own comm

This looks great to be honest to build collaborative slide decks. But the one thing I’m seeing in recent times is that every product is building their own communication layer especially for video/audio instead of letting users default to a catch-all solutions like Slack or Teams or any other similar software. Saw a similar app for collaborative coding with their own audio/video recently. Interesting development. Not sure if everyone is building this from ground up or there is a communication as a service product/api which they leverage on. (Chime? Twilio?)