Compare that to GeForce now, which can stream (some of) your existing library, and it's obvious Stadia had no chance.
You had to pay the monthly subscription, plus buy the games, and if you stop paying the subscription, you lose the games! That's a terrible deal and many in the gaming community predicted the demise of Stadia exactly because of this.
If nvidia can make it so GeForce Now can stream your existing library, surely Google could too? It's baffling that Stadia management didn't see this.