I’d personally love to see some sort of integration with another federated chat service, like Matrix, to avoid reinventing the protocol. That said, you can already just make a matrix account and use that so I’m not sure how much value putting it directly into lemmy really adds.
I was thinking more like “your lemmy account is already a matrix account” kind of integration, but of course that’s way more programming work than what lemmy already does(which I didn’t know about). It’s definitely cool to see matrix being treated like a sensible default though, very happy with lemmy on that decision.