I think Google might adopt it. If it's decrypted in the client (i.e. the Gmail web interface) Google would still be able to inject ads based on your email. That

I think Google might adopt it. If it's decrypted in the client (i.e. the Gmail web interface) Google would still be able to inject ads based on your email. That allows them to maintain monetization while having the ability to claim end-to-end security.