Nobody in my country really uses SMS, because it costs. Instead, what I'd like from signal is an open source client library, so I could build bots and use Pidgin to talk to my contacts. Is that too much to ask?
Yeah, the fact that you can't just text your Signal phone is really constraining :/
Matrix is great and I really hope it takes off, but security is bolted on, and the clients aren't really on par with Signal. I'm going to wait a bit before I switch to Matrix, but hopefully I will, at some point.