@mthie @Tutanota "But then the Company loses control over who can send/receive things. Horrible for investors"
This is just completely made-up bs. There ARE NO INVESTORS. This is not a for-profit enterprise.
Building a personal messaging system with the privacy properties Signal has *does not work* on the XMPP or Matrix model. The "e2ee" on top of them is an utter joke.
It is possible to do real-decentralized with same (and even stronger) privacy properties than Signal, but the tradeoffs are heavy. See: Cwtch or VeilidChat. Note that this relies on having a p2p/cooperative transport layer.
Anyway, you're not going to get normies on these any time soon. What Signal does is deliver absolute privacy of message contents (subject to participants or their devices not disclosing) and fairly strong privacy of metadata, to a wide non-expert audience. Nothing else is doing that. Everyone else who claims to be doing that is a fraud putting people's safety at risk.
The folks shitting on Signal with bullshit complaints, and recommending these fake secure messenegers (explicitly or implicitly), are also putting people's safety at risk.