I’m pointing to this as evidence https://cloud.google.com/customers
I feel like a lot of the problems that people run into with GCP are avoided with two main components.
Number one you should look seriously at the “enterprise” designation for different products and services if you are looking for long term stability and guarantees about the future (details: https://cloud.google.com/apis/docs/resources/enterprise-apis) and secondly you need to buy actual customer support as an add on if you want to avoid the “I had to hit the front page of HN to actually speak to someone” scenario https://cloud.google.com/support