Probably doesn't matter that much because it's just hardware. Presumably not that hard to run your software on another intel box with nvidia GPUs. There's also plenty of demand for nvidia GPUs right now, still no guarantee given it's Google, but it would be hard not to make money with this.

No, not for GCP stuff.

I don't know of a single GCP product that's been shut down, although I could be missing something. But their track record for GCP is, I think, what you would want a cloud provider's record to be.

(I should mention that I work for GCP. But this is just based on my own memory.)

This is the way.