Comment by verdverm

PKI distribution for encrypted data is an unsolved problem at the scale of many millions or billions of people. Signal caps at 10k iirc

It's also generally not advisable to make your cypher text publicly visible

That being said, I'm working with others in the ecosystem on "permissioned space", which are much closer to how people think about Google Docs and similar systems working.

There is also another effort around E2EE content (MLS) for messaging. They are also thinking beyond just messages too