The terms of service (https://cloud.google.com/terms/) point to the cloud platform deprecation policy (https://cloud.google.com/terms/deprecation). The Cloud Platform deprecation policy points to the product launch stage page (https://cloud.google.com/terms/launch-stages), which points back to the "deprecation policy" section of the terms of service!
As a CIO, I would be most concerned with the ecosystem and availability of talent. Google have done a good job trying to reuse some of the same tools and ideas like reuse boto, but writing scripts for their cloud platform vs. AWS is still as different as English and Dutch.