Because do you see what's happened here? Whatever interesting discussion there might have been to be had on this project has now been smothered by the top-voted comment being just a tired repetition of the same "Google kills products, hehe, hehe" echo chamber. (I don't know if there really is that much discussion to be had on the actual topic of the post, but it should at least get a chance!)
Source: I work at Google
For how much longer? Stadia devs sure thought they were in for the long haul.
Nobody at the company is tasked with actually working on it, the creator often no longer works at there, the team that built it often either no longer works there or has moved to another team that does something entirely different.
After a few years, they officially axe it, and it gets added by the KilledByGoogle list; but it was clearly already dead and shuffling around like a zombie.