I am a customer. I played several AAA games all the way through on Stadia and it was a great experience. It was not like OnLive back in the day. If Stadia gets shut down then I'll have to switch to GeForce Now which is way more clunky.
That is how all of this works. If Valve went out of business then you wouldn't have any legal right or way to get the games you purchased on Steam. If Amazon shut down Prime Video then you couldn't watch the movies you purchased on it. This is not a unique problem to Google Stadia.
It seems like Stadia was just a proof of concept for Google Stream which they will white label for partners (like AT&T Batman partnership). I initially thought that Google Stream was a side project for Stadia but it seems that Stadia was the side project.
There are two different definitions of OP. Original poster and Original post. The original poster is the person that made the original post. The parent was hoping that the link would be on the original post and not on a comment which could be under many other threads.