> You mean like the mass surveillance already implemented by Google, Facebook, Apple, Microsoft, and Amazon?
No, GP is referring to mass collection and analysis of all of your communications. Google, Apple, et. all don’t have that capability today.
Hell, apple can’t even read my text messages, nor do they know I’m writing this - and I’m doing it on an iPhone.
You only believe that because you have chosen to believe it.
Take Facebook end-to-end encrypted messages for example. There are certain links it won't let you send, enough though it is supposedly E2EE. (I've seen it in situations like mentioning the piratebay domain name, which it tries to auto-preview and then fails. Hacking related websites as well I've seen the issue with.)
It likes to pretend it is a mysterious error, but if you immediately send a different link, it sends just fine. I don't use chat apps much these days, so I'm not sure if others see similar behavior, but I'd wager some do. Facebook is about the least trustworthy provider I'm likely to use, FWIW, so I expect a certain amount of smoke and mirrors from them.