Comparing Stadia to Sun Rays does not make sense. Companies buying Sun Rays did have to pay for the server in the basement. For me it solves an actual problem - I want to play Red Dead Redemption 2, but don't have a gaming desktop computer or a TV, just a Macbook. I don't have to spend $2000 on a machine that will be obsolete in 2 years, takes up a ton of space in my house, even when not in use. Why isn't the use case obvious?