For me Signal is not an option. Any pretty promise can be broken on a whim in the same fashion Facebook acquired WhatsApp and could then do whatever they wanted

For me Signal is not an option. Any pretty promise can be broken on a whim in the same fashion Facebook acquired WhatsApp and could then do whatever they wanted with it. Any pretence of user-friendliness has been defeated when Signal started pushing their crypto and bar their users from using an alternative client. Centralised services are problematic by design, and almost always abusive.