1) For three whole days, it was questionable whether or not a user would be able to launch a node pool (according to the official blog statement). It was also questionable whether a user would be able to launch a simple compute instance (according to statements here on HN).
2) This issue was global in scope, affecting all of Google's regions. Therefore, in consideration of item 1 above, it was questionable/unpredictable whether or not a user could launch a node pool or even a simple node anywhere in GCP at all.
3) The sum total of information about this incident can be found as a few one or two sentence blurbs on Google's blog. No explanation nor outline of scope for affected regions and services has been provided.
4) Some users here are reporting that other GCP services not mentioned by Google's blog are experiencing problems.
5) Some users here are reporting that they have received no response from GCP support, even over a time span of 40+ hours since the support request was submitted.
6) Google says they'll provide some information when the next business day rolls around, roughly 4 days after the start of the problem.
I really do want to make sure I'm understanding this situation. Please do correct me if I got something wrong in this summary.