There was a Hangouts on Air ? Its funny that some of these discontinued Google products seem to get more attention at their ending then at their start.
Theres an entire site dedicated to listing products killed by google: https://killedbygoogle.com/ tons of products there that I didn't know existed.
I am betting Stadia is on that list within 24 months of launch
For a little while there were startups being built around it even (AirPair comes to mind, though they eventually switched to Slack, and now is more or less defunct)
Oh interesting, I didn't realize airpair was basically dead. Looks like last twitter post was in 2016, and their articles all have comments from 4 years ago