@not_benis It's not fully free, but the software the whole infrastructure is running is probably less proprietary than what your computer is running.

google prefers free software for security reasons and the flexibility it gives them - they can go and add spyware that serves their interests and run that on their computers.

Of course the AGPLv3-or-later puts a stop to that practice, as if the software is modified to add spyware, google needs to offer the source code to all users who's computation is done by that server and google obviously doesn't want to have to send off hard evidence of their criminal acts - so google has banned software under the AGPLv3 - even for internal-only use.