↳ In-reply-to » Another thing that doesn’t work anymore after blocking network traffic from my Android phone: Some push notifications.

Actually, it looks like notifications using Google’s service can be encrypted end-to-end. I don’t know if this is used much in practice or if you can tell if the notifications on your device are encrypted. There seems to be some conflicting information out there.

Even if the content is encrypted, though, you’re still giving quite a bit of metadata to Google by using their notification service.