A big part of selecting a cloud service provider is trust. You have to trust that you can build your stuff on top of theirs and they aren't going to pull the rug out from under you. Right now I don't know how anyone picking a cloud service provider can confidently go with GCP, and the only ones I see moving to GCP are those that get massive discounts for doing so.
I'm making a bet that in 10 years, GCP will be no more and most likely sucked up by either Azure of AWS.