They did:
"We take full responsibility for the architectural decisions that allowed a single upstream provider action to cascade into a platform-wide outage, and detail below what happened, how we recovered, and the changes we are making to prevent this from happening again."
My guess is they will be switching away from Google Cloud. Because anything else would be nuts.
I know hating GCP is hip, but why do only a minority entertains the possibility that Railway did really something off to trigger some alarms?
The calibration of the alarms might be off, and that's acceptable, but in the end if something can be held wrong, somebody will hold it wrong.
I did the same thing in the past, albeit in a much smaller scale. There's no shame in being wrong and admitting as long as it results in progress, so this stance of "we do nothing wrong" from both parties is getting a bit old now.