Yup, that's exactly what everyone expected since the beginning. And that's why publishers were not very interested, because they always suspected that's what would happen. Why invest when Google will get bored and shut it down in a couple years?
Ironically, I am now only subscribed to a visit GeForce Now, which requires game purchases. This is primarily due to Sony’s lack of macOS support for PS Now, and my owning an M1 with no Bootcamp support.
Stadia was cool and I think there is a future for this sort of gaming in some genres and for some audiences, but I play fighting games and it absolutely did not work "fantastic" for them, even living in Boston and having a sporting symmetric-gigabit connection.