[kortilla]

> But if the clusters are configured similarly, a flaw in one is likely present in the others.

That doesn’t matter. The point is that you isolate applications/tenants into different clusters. So if someone exploits their own, they haven’t gained access to some other application.

> assume they mean having more clusters present means there are more opportunities to be compromised (e.g. more credentials to leak, more API servers to target, possible version skew, etc.).

That doesn’t even make sense though. In our strawman scenario these are cookie cutter things. Many is not more vulnerable than one in this case.