Stadia died because no one trusts Google
I feel like some of these perspectives are very tech industry focused rather than gamer focused.As a gamer, I think Stadia failed because the system they created doesn't make sense. You had to buy games at real $40-$60 prices but you could only play them through this limited service. I don't think anyone wants that.Compare that to paying the same price for a regular PC game which you can play via streaming using a streaming service, but also play locally, and know that you can take that game with you through multiple hardware decides and streaming services.With Stadia, if I move somewhere with bad internet, there is no way to recover the value of my games I purchased. There is no other gaming system like that. All other systems either have an offline possibility or are pure streaming where you aren't making a game purchase investment, like Xbox Gamepass or Luna.It just doesn't make sense except to a really small niche and is not competitive to the average gamer.