> You don't just shut GCP down.
No, but you could "Google Group" it. Just keep the lights on and not develop it any further and just watch customers leave over time. There might actually be a bunch of corporate customers that would view the static environment as a plus.
I don't really see them shutting down GCP, even if it's a bit anonymous. It is interesting that Google can't turn a profit on GCP, given that both AWS and Azure is doing to well.