I would argue that the second learning is to make it impossible to comply with these subpoenas where possible by making it so the company itself is unable to decrypt it.
Admittedly this is not really an easy solution with something as open as emails, it's possible within corporations but I don't know of a solution between "random" people.
But outside of email and things that have to be unencrypted for interoperability, everything should be encrypted and inaccessible to the company so this situation is impossible.
I think the ship has sailed on the idea of electing people who will actually care about privacy of their citizens.
Admittedly this is not really an easy solution with something as open as emails, it's possible within corporations but I don't know of a solution between "random" people.
But outside of email and things that have to be unencrypted for interoperability, everything should be encrypted and inaccessible to the company so this situation is impossible.
I think the ship has sailed on the idea of electing people who will actually care about privacy of their citizens.