What I’m looking for ultimately is a universal chat type app like Beeper that can handle Signal and SMS, however, reading this about it gives me pause. It would be nice if I could get all my peeps on matrix, but since it was so hard to get them on to Signal, I think the best I can hope for is something than can handle matrix, signal, and sms. Which brings me back to the title, how exactly do Matrix bridges work and are they secure?
EDIT: SMS is insecure by its very nature, yes?
There are a few more settings you can tweak than your standard messenger (e.g. message bubbles or timeline), but the day-to-day interaction should be fairly similar. Chat rooms allow you to chat with any number of participants. Matrix doesn’t really differentiate between “direct” chats and group chats, as you can always add more participants later. Spaces are a way to organise rooms, like a folder.