This is truly the most baffling thing. Google could have truly just built a very tight end-to-end cloud hosted "streaming" product that would have leveraged all their Cloud infra to help you play YOUR games... just on any device through their UI. Pay a small hourly or monthly rate (think spot rate for cloud GPUs) and there... you have a business.

Other people have done it sure and maybe that is why Stadia tried to go even bigger, but if they just launched a simple product like that I think it would have been a big hit (and truly hit the market of people who want to play the latest games at full settings but don't have the hardware to do so)