I think we're more likely to "accidentally" end up there via E2EE document collaboration tools that are in development now. One day, a while after they become

I think we're more likely to "accidentally" end up there via E2EE document collaboration tools that are in development now. One day, a while after they become usable and common, people will just realize they've been sharing documents E2EE in place of sending email, and they'll be using it for basically everything that matters. It would be a proper restart and allow for significant improvements in usability and security and everything else.