Now wait... It isn't surprising that inside the datacenters most traffic flows unencrypted, but not encrypting links between datacenters?
Well...
Well...
It makes like a bit more complex, but PGP can be used for mail and here's how to protect GDrive files: https://news.ycombinator.com/item?id=6644888
Remember these revelations date from a year or two ago, who knows what they're up to now?