We've switched to Signal, but we mostly do one-to-one conversations.
Personally, I think that the demolishing of Skype (let's call it for what it is) has left a massive gap in the market. It's a shame the WebRTC concept is still too distributed over companies, if there was one setup who put some coding into that they'd have the market.
That said, why is anyone surprised about this? Microsoft has a long and proud history of totally screwing up usability on very good software. The ribbon and what they did to Visio after they bought it are excellent examples of that, they couldn't develop a useful, function-only driven UI if you gave them printed instructions and a map. Their worst problem is that they are not in the slightest interested in what users need, the marketing department dictates it all.
Add to that the provable message intercept and we've stopped using it a long time ago.