Are these extremely large shops in some sort of pocket universe? Because I've been around the block enough to regularly experience Kubernetes's issues over and over again, and I'd say that the GP comment you're critiquing is actually right on the money. In my experience, people downplaying Kubernetes's drawbacks have either never been bitten by them, or make a lot of money by getting people to use Kubernetes.
Complex systems are complex. If you don’t need it, don’t use it.
But you’re absolutely wrong to call it unreliable. I’ve also “been around the block”, and I’ve seen 50k lines of BASH fail in complex ways too.
A google search would show you plenty of extremely large shops using k8s, and dozens or hundreds of tech talks by their lead engineers saying how much better it made their lives.
