Earlier quoted context omitted.
My concern for Stadia revolves around Microsoft's upcoming offering. Apparently, Microsoft is simply going to rack-mount XBox hardware and stream it that way, which means the entire XBox library is instantly compatible. For Stadia, games have to be modified specifically for it and their Linux configuration, which limits what games are announced for the platform, and requires engineering effort.
If that MS approach works, why hasn't Netflix or Gog or someone already done it for any games?
Streaming live and streaming offline media require very different infrastructure.