This could be a lot of people with a business or Apple laptop living far from home - business trips, expats, migrants. I had to migrate recently and currently have only a work laptop with me, so I have tried Stadia and it was rather good for some games. Best example - ESO, which for 10$ pulled all my progress and DLCs from the cloud. But yes, with the Google "reputation" and the requirement to re-buy all games the second time Stadia is dead in the water, I won't invest there anything above a few dollars.
Have you ever tried GeForce Now? Similar or better performance than Stadia, but it just uses your existing Steam library.
It's a separate subscription (free to $20/mo) for the streaming service, but you can play many of your current titles without re-buying them (not all, due to publisher withdrawals).
To play ALL your games, Shadow.tech will stream a full GPU-enabled desktop that you can run anything you want in.