It’s exciting to hear that Moxie and colleagues are working on something like this. They definitely have the skills to pull it off. Few in this world have done as much for privacy as the people who built Signal. Yes, it’s not perfect, but building security systems with good UX is hard. There are all sorts of tradeoffs and sacrifices one needs to make. For those interested in the underlying technology, they’re basical…
Signal's achievement is that it's very private while being extremely usable (it just works). Under that lens, I don't think it could be improved much.