[zzzcpan]

> As a Kubernetes maintainer, I WANT to say that a smaller number of larger clusters is generally a better answer.

I'm not trying to nitpick here, but that justification is awful. It goes against reliability engineering on a deeply fundamental level, pretty much guarantees to make already not that reliable things even less reliable. Generally the more isolated entities you have and the smaller they are the less they affect each other and the environment when something bad happens, the faster they can be recovered, the fewer end users they affect, etc. If I remember correctly, this is even how some Kubernetes people justified ideas behind Kubernetes itself that you want to drop now.

[thockingoog]

That is not absolute truth. If it were you would eschew kubernetes altogether and just use VMs.

Everything is a tradeoff. If you want total isolation, you pay for it. If you don't want to pay for it, you make more value-based tradeoffs.

Concretely, Google runs "a handful" of "pretty reliable" services on a relatively small number of clusters.