WhatsApp nailed distribution, Signal does privacy well, Telegram is simple and scalable. What is Matrix? None of the above. I'm sorry, that might come across as harsh but I see a lot of wishful posts here that kind of throw users in that direction without real insight and knowledge into it. We don't want DIY that's endlessly complex and hard to maintain. The reason centralised apps work is because there's no setup, so really you're fighting frictionless experiences. Want to make self hosting a better experience, make it frictionless.
I wish they'd focused on building a messenger first, rather than trying to be a Slack/Teams/Discord. That said, it's taken a while but the Element client is dramatically better now. It still doesn't have the polish of other messengers, but I'm rooting for them to dial that in.
Another problem is that a focus on federation limits your appeal to people who like to self-host things.
