As a Kube operator, I'd prefer the option of choosing what RAID (if any) hosts I provision would use. In some instances, if you're trying to build an HA kubernetes cluster you want to ensure you have a proper disk-per-host ratio based on the number of hosts in the kube cluster (as well as a part of a storage cluster, e.g. Ceph). In some of Equinix Metal's plan types, when you're looking at potentially a total of 2-3 disks, you may want your OS on a disk by itself (not-RAID'ed) so that your other disks could be a part of your Ceph / storage cluster (whatever your flavor might be). In instances where you have >=3 disks per host, you may then want a RAID configuration for boot, another volume for container logs, another volume for your OSD's / storage cluster. Allowing for multiple permutations of the above vs. a default assumption for RAID1 would be the best approach, IMO.