Thank you! I was unfamiliar with both age and Cwtch. From what I can tell, Cwtch is also a linear messaging system. Are you aware of any software offering secur

Thank you! I was unfamiliar with both age and Cwtch. From what I can tell, Cwtch is also a linear messaging system. Are you aware of any software offering secure non-linear (hopefully threaded) messaging, i.e. a secure e-mail replacement? It does not have to be MIME, SMTP, IMAP based like PGP, but preferably support for similar branching conversations and archiving and hopefully with support for multiple users. I love Signal but I find that finding old messages, or groups with more than a few people and branching conversations is a lot less pleasant than e-mail. And thus Signal is not currently a replacement for e-mail for me but a great addition.