I feel that we are a little bit too hard on the big G on this one. They simply have their own inner startups, which they kill if product gains no traction. We should look at how many startups from YC die within 4 years and make the comparison. I might be wrong, but the ratio could be very similar. Still, Stadia will fail for sure ^^
"No traction" for a Google product just means it's not the next Search or Gmail. It doesn't mean that zero people use it. Thousands or millions of people used Hangouts, Google Reader, Google Code, or Picasa - they'd have been considered big YC successes. If big YC companies all got shut down if they failed to turn into another letter in the FAANG acronym, maybe people would become reluctant to use services from YC co…
Other than google reader I doubt any of these would have gotten traction at all without big g behind them.