Indeed, my point was that it's a quantitative question not a qualitative one.
When compilers created buggy code every other day, when memory allocators were unreliable because memory fragmentation would make it likely for new allocations to fail in the lifetime of a normal program execution, etc, it would be, as you said "a disaster if it works <95%" of the times.
Did k8s reach 99%? The jury is still out. Probably not yet, but in principle I don't see anything wrong pursuing that path just because it's "another layer". We use abstraction layers all the time; they allowed progress (Yes often we went too far)
When compilers created buggy code every other day, when memory allocators were unreliable because memory fragmentation would make it likely for new allocations to fail in the lifetime of a normal program execution, etc, it would be, as you said "a disaster if it works <95%" of the times.
Did k8s reach 99%? The jury is still out. Probably not yet, but in principle I don't see anything wrong pursuing that path just because it's "another layer". We use abstraction layers all the time; they allowed progress (Yes often we went too far)