I think it's mind boggling that in 2026 encryption and signing of emails is still not a common thing, only because it's Google's business model to snoop on their users' email. For that reason we can't use email to send sensitive data and need apps for every little thing that could have been an email.
At the same time the dumps of government and corporate emails have been invaluable to society at large. They’ve helped win court cases, uncover corruption, etc.