It's not worse overall, just different. Early on (changing somewhat now), large scale and throughput were not big goals for K8S. Given most uses are with VMs,

It's not worse overall, just different. Early on (changing somewhat now), large scale and throughput were not big goals for K8S. Given most uses are with VMs, and pretty much all uses are tiny compared to Borg, this was a totally reasonable prioritization. K8S fixes many many serious issues in Borg that are mostly unfixable at this point (I worked on Borg for many years), it's better in many ways. For scale specifically, Borg has a big advantage in that the state database in internal (the master maintains it directly on a local disk). This is naturally much faster then using etcd (at least etcd today).