Yes. These actions just give me more fire as argument against every using something that is done by google. Be it GCP, Firebase or anything else, really.
The Firebase CLI is really good and the platform itself is one of the best for startups focusing on speed and low complexity to get to an MVP.
I guess using services which you can spin up yourself from free software code should be ok.
Migrating SaaSes is a normal activity in corporate America and often wins the ROI calculation, but building on GCP is generally questionable at this point.
But if you stick to long running products, even with Google, you are unlikely to have that issue. Eg. so many companies are relying on Gmail and Google Docs for their work: I don't think anyone feels they are going away anytime soon. Basic Google Cloud services (eg GKE) are likely to keep humming along fine.
But there are a number of smaller SaaSes that will show up with a specific niche product (like Firebase Dynamic Links here) that may be gone as quickly as their VC capital runs out.