@fla Pragmatism is often important! I am interested in privacy and security, I indeed know some but is not at all an expert. In reality, it mean I use SMS, iMessage, Facebook Messenger, WhatsApp, LinkedIn messenger, and probably more. And I do also use Signal and Matrix, but not so often, because the primary goal is the communication with the specific person. But when I can choose, and nudge other, I prefer one Signal and Matrix, of those above. That is shortly my background to the question.