While I would love a personal tour of a stadia data center I know that will probably never happen. I bet that most people working on stadia have never seen the hardware it's actually running on. A virtual tour of a stadia data center produced by Google or with one of the youtube channels dedicated to stadia would be really cool to see.
Very interesting request @kingof9x . As someone that currently doing a lot of Cloud projects, I'm definitely interested visiting one of Google's data centers just to see what's under the hood. Not sure how possible it is to be done though, especially during pandemic.
I have heard that most google employees don't even have the ability to see the data center if they don't need to as a part of their job. For security reasons I can understand keeping any chance of physical access to their hardware as low as possible.