We are building something like this for AMD MI300x GPU CI workloads. Except that every time someone shuts down a VM, we start a fresh one; hot spares cuts down your start up time.

We take on the small fortune expense and multi tenancy does the rest. The plan is to offer this as inexpensive as possible (far cheaper that deploying and running this type of compute yourself), so that it is a no brainer to take advantage of.