As a Google SRE (personal opinion) I feel I'm held to a pretty high standard for oncall responsibilities and support of production services. Unfortunately I'm under NDA for many of the details, but I certainly don't think that most companies are held to the standards I feel we're providing.

As a previous Google Cloud customer, we got pretty good support and responsiveness to outages. The details of any SLAs will vary by customer and contract, but there's accountability there.