[kscz]

It's mostly a question of mobile support: IRC (over TLS or otherwise) requires a continuous connection, where matrix and signal are designed to support polling a push notification endpoint.

Out of curiosity: what makes you say Matrix is over-engineered?

[justinsaccount]

Oh.. maybe not over-engineered, but just more involved than what I need. I mostly just want a way to move messages back in forth. I don't need voice or video calls or anything like that.

[nextos]

One of the use cases Matrix was designed for is Internet of Things, so I think it's just fine for you.

Video calls come thanks to WebRTC in browsers, Matrix is just a transport protocol. I think it's quite light.