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?
Signal'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.
Dunno, it's fine for me. As a messenging app it moslty gets out of my way and lets me communicate. It has all of the important functionality and creature comforts. Also, it already has some bloat (stories, whatever that crypto payment thing was/is). And the UI / UX is perfectly fine as is.
Although, as a dev myself, I hate UX work, it's just boring and unfulfilling. I get why UX is often an afterthought. First it has to be functional, anything beyond that is secondary.
Signal has read receipts, reactions and typing indicators. That's 90% of what any messenger needs. It also let's you schedule texts. I do wish it would do reminders and pinch to resize text though.
Dunno, it's fine for me. As a messenging app it moslty gets out of my way and lets me communicate. It has all of the important functionality and creature comforts. Also, it already has some bloat (stories, whatever that crypto payment thing was/is). And the UI / UX is perfectly fine as is.
Although, as a dev myself, I hate UX work, it's just boring and unfulfilling. I get why UX is often an afterthought. First it has to be functional, anything beyond that is secondary.
Matrix also does have a pretty big problem with meta data. By default it stores a ton of meta data (at least the reference server implementation does) and I am not sure if this is even a solvable problem without redesigning the protocol. When opting for an alternative to Signal, XMPP is probably the better choice.
That's a good question. I wonder if there are available user numbers for them.
I imagine it's regional and depends on what communities you are in. SimpleX chat seems pretty popular these days in privacy circles but I could see something like Briar being useful if traditional networks weren't reliably available for example.