etcd has a 1.5 MiB limit on requests - but if it grows by the number of VMs that we have in the plan we could well exceed that limit as it's not so high that said, plans are designed for a single target namespace and it's not clear whether migrating so many VMs to a single namespace would be a common practice in the field So we need to include somewhere in the documentation that: The size of the Plan should be no more than 500 VMs or Disks