Maybe they don't need to write new software. Qubes-OS didn't need to write all linux software from the start. It just secured the infrastructure.
What if we could do that to popular web frameworks?
And than, what if we had tools that could easily define, specific security properties of web sites built on these platforms? For example, "no data ever flows between different users, unless it's via specific API call by the user's code?"
And if we can define a security property, in a specific application, for ex. slack that says "data in a chat between two group members can only go to the group manager, if the setting "manager as god" is set by both users", and the AI can formally verify that? And than have a short file defining all the security properties we want for out specific application ?
And than have AI formally verify all of that?