I'd be glad to pay a 'match' fee, where they match my library for a small fee per game. But buying $60 games again is not going to happen. This might mean I purchase future games on Stadia.... Maybe. But not games I already own.

I feel that's a huge advantage of Nvidia's solution. I'd probably rather pay $10/mo to play my existing Steam games and continue buying games on Steam. Then I'd own them. If Nvidia closes their streaming service, I still have my games. If Google closed Stadia, you'd lose everything!