I do genuinely wonder what the appeal was to build an entirely new and slightly different hardware platform (using AMD hardware, like PS4/Xbox) when they could

I do genuinely wonder what the appeal was to build an entirely new and slightly different hardware platform (using AMD hardware, like PS4/Xbox) when they could have easily licensed Gamestream like what Shadowplay did? Was NVIDIA not willing? Google probably already has massive data centers full of Nvidia GPUs. Stadia is DOA, because of its absurd pricing and rollout, really strange design decisions (usb controller for select phones, but wireless for Chromecast?)