This does not sound like knowledgable feedback. You should consider investigating and fixing the problem next time. At least to the point where you can explain

This does not sound like knowledgable feedback. You should consider investigating and fixing the problem next time. At least to the point where you can explain to others what failed. A problem that continually affected you thru many clusters sounds like a configuration issue. PEBKAC, etc. I previously worked for a company that ran highly-reliable systems that put human lives at risk. We increased the reliability of deployments and rollbacks quite a lot by moving to K8s, and that was years ago, when K8s was much newer than it is today. A very good friend still works there and they have zero plans or desires to move off K8s, as it works fantastically for them. They maintain 5 nines uptime and are responsible for daily hospital operations. Also - plenty of human lives rely on “websites”. Your car probably speaks HTTP. I don't understand this line of thinking at all.