The value prop for Stadia is console-class gaming without hardware. Most devices where Stadia is able to run could run a port of a decade-old PC game. Similarly

The value prop for Stadia is console-class gaming without hardware. Most devices where Stadia is able to run could run a port of a decade-old PC game. Similarly, most Steam games that could run unmodified on Stadia's custom server hardware (running Linux, not Windows) would be games that don't tax the hardware. Maybe that's a better service than what Google rolled out? (GeForce Now seems to be doing better than Stadia, anecdotally.) But it's not what Stadia is, and if they wanted some more recent console-class games, Valve as either a storefront or a game developer was not going to help them much. They would still have to deal with getting Ubisoft/EA/Activision/whoever to do the ports.