Do you happen to have an experience with using briar and can comment on it? It seems cool and using its mailbox system on a secondary old phone to get 100% uptime despite it being p2p is a nice concept. I just havent gotten around to really testing the UX when using it with multiple other people much.
The way i (and many others) see it, anything that is not both open source and fully decentralized is automatically a no go. Open source for rather obvious reasons. Decentralized for less but increasingly obvious reasons (No central failure point, no central metadata collection, no central authority, no lock in).
So yeah those are obviously shit too. Signal is the last centralized thing i use, but im starting to phase that out now too.
With all sorts of anti E2EE sentiment and right wing parties on the rise everywhere, i would rather get rid of any communication channels that are so prone to being blocked, shut down, censored, etc.