I agree that reinventing "secure and private chat" like everyone else is a very very bad thing to do.
Matrix is already shaping up to be absolutely wonderful -- it's feature-rich, its security and privacy is legitimate, it's open-source, and it's built around bridging to other chat networks, both open and closed.
A ProtonMail Matrix homeserver, with every ProtonMail user having an account, maybe even with a Matrix client built into ProtonMail, may be sensible, but even allocating those resources instead of just _using Matrix_ seems hard to justify.
I agree that reinventing "secure and private chat" like everyone else is a very very bad thing to do.
Matrix is already shaping up to be absolutely wonderful -- it's feature-rich, its security and privacy is legitimate, it's open-source, and it's built around bridging to other chat networks, both open and closed.
A ProtonMail Matrix homeserver, with every ProtonMail user having an account, maybe even with a Matrix client built into ProtonMail, may be sensible, but even allocating those resources instead of just _using Matrix_ seems hard to justify.