Leaving Gmail for Mailbox.org

> The problem with email is that everything is transmitted in plain text.

That's not a Gmail problem, and no reason to migrate. Some use cases just don't fit email, and for those, we have other, more fitting platforms.

> So, I went with mailbox.org that still offers integrated PGP encryption, and if you want, you can always use external PGP too (which I was already doing with Gmail).

Ok, so now you have two problems.

> That's not a Gmail problem, and no reason to migrate.

It is a problem with Gmail, because they're helping themselves into your email, as was explained by the author in the sentence immediately after the one you quoted:

> Technically, Google can store every message you receive and know everything, and U.S. agencies can request access to that data