Doesnt "Metal" infer you get the whole box to yourself? Curious if my definitions are different to others here because I don't get what's "Metal" about sharing an instance with others.
You're still sharing nvme IO, cpu, memory bandwidth, etc. Not having a VM isn't really the point. (EDIT: and could have been done with non-metal aws instances with direct-attached nvme anyway)
I also think this naming is misleading - there is a very clear association with "bare metal", which is not what is being offered here
Within PlanetScale's product lineup, Metal refers to the use of local NVMe drives. Nothing more. These extremely affordable sizes are indeed slices of larger boxen, though no resources are overcommitted.