AprilF00lzDownsides of Signal alternatives compared to Signal?
The difficulty of any non-mainstream chat app is getting other people to use it. On that list, Signal is the most probable to be recognized by people who don’t have a particular interest in privacy, so it’s more likely to get more people to use it.
besides that, and besides the lack of forward secrecy on matrix and session already mentioned by privacy guides, do some of these alternatives have worse security, privacy, or ux than signal in some way?
both have worse UX than Signal. pretty much all except Signal are lacking on this front. OSS developers are allergic to a smooth UX in general
EngineerGamingSignal’s UX is NOT good unless you want to expose your encrypted conversations to a smartphone (of which far from all can run a private OS). All because of no desktop registration. You either have to use inconvenient signal-cli, or an Android emulator which creates its own troubles.