I've never used matrix for more than 10 minutes, but I'd like to counter this with WhatsApp. WhatsApp has a swipe up to talk. This feature when used in a group effectively sends audio from you walking in your pocket to potentially thousands of people.

Internet groups are littered with complaints about this feature. But there is no way to turn it off and meta appears to not give a sh*t.

So, I'm not sure you can really argue that Matrix is not serious when that is the competition.