Again, you're not getting the point. It's about behaviour. How often have you seen AWS deprecate stuff?
The BOTO API for S3 is an ugly mess, but you can still run BOTO2 code from a long time ago. With Google I guarantee you they'd have killed off the old API in a similar situation.
Similarly, how often did you see Windows deprecate core Win32 API calls? There's no SLA that says Windows 11 should run XP era programs. It just does, because they don't want to piss off people who depend on them.
As a user, I'm happy with deprecation happy products (hi Apple!). As an enterprise customer? Nope. We're paying you to ease our problems, not the other way around.
As long as GCP doesn't take this concern seriously, they'll be relegated to being a commodity provider, along with digitalocean and friends. We'll use them when they're the cheapest, and only for stuff we can migrate in 24h.
Guess what? If I'm looking for the cheapest cloud for VMs and storage, there's much better than GCP out there.
And as long as their freaking CEO doesn't get this they won't come out of the hole they dug themselves.