I love Stadia. I bought it for a friend last Christmas and we have been using it this year to play games together, she has a Macbook which cannot play a lot of PC games and the Stadia model works a lot better for us.
Despite the lack of AAA titles, it had everything we wanted to play, we just started playing overcooked on it. Now I do not know what we will do.
Geforce now will require a subscription + the game and I believe this doesn't work anywhere near as well on her connection.
We've also been doing playthroughs of Life is strange together, due to the new feature where they let you watch another player play.
Stadia was absolutely perfect, Google absolutely messed this up and i've got a bunch of games i won't get too lined up.
It was fun while it lasted.