Yeah if someone says that k8s is costing them energy they are either using it very, very incorrectly, or they just don't know what they are talking about.

Running a Kubernetes deployment requires running many additional orchestration services that bare-metal deployments (whether running on-prem or in the cloud) do not.

"bare metal" "cloud" - pick one.

Also, those simpler deployments usually burn more money per utilized compute, or involve reinventing 80% of kids, often badly

Many cloud providers offer bare-metal servers: https://en.wikipedia.org/wiki/Bare-metal_server#Bare-metal_c...