Except Signal works for me. Every version of SimpleX has been buggy, and very misleading.
Discussion
the thread is about Deltachat
Ah, I saw the note later where you were talking about SimpleX. My mistake. I installed Delta Chat, but haven't used it yet.
Signal is good, but I will not use it unless I know someone IRL, because of the phone number requirement. It's got good network effects, and I won't use WhatsApp or Facebook messenger or any of that garbage, at this point just about everyone has more than one person in their lives using signal, the social friction to onboard is not that much like it would be with something like simplex.