Which was ultimately a tech driven chicken and egg problem. I know someone who is the lead for a popular game. They said they'd need to drop DirectX and effectively port the game to Linux to get Stadia working, which wasn't worth it for the user base.
Google could have easily paid some game studios to produce content. MS and Sony would not dream of launching new hardware without some decent launch titles. And it's not like Sony uses directx or windows. Neither does Nintendo.
Google came empty handed to what is a very competitive space. It's all about the games. That's not a technical problem but a doomed product strategy. They failed to engage with game developers to develop for their platform.
And of course valve had the same issue and and actually fixed it. Many games run fine on Linux these days with Steam. That could have worked for Google as well.
Which was ultimately a tech driven chicken and egg problem. I know someone who is the lead for a popular game. They said they'd need to drop DirectX and effectively port the game to Linux to get Stadia working, which wasn't worth it for the user base.