According to your own citation, Google deprecated multiple APIs every year. So the odds of Google cutting off access to an API you use may be decreasing... But it's still nowhere near zero, and it's still a valid concern.
The question is not “is Google better or worse than average?” It’s: what is the risk of building an app on a Google API? The risk is high, and it’s not worth it. Their track record is abysmal. Sure, if you pick a random provider out of a hat, maybe Google is better. But if you look for a solid provider or better just build your own service instead of trying to glom onto someone else’s (someone with no real incentive to see your product succeed).
