Why would you overload this machine for that need, though? Just have a laptop sitting on a shelf for when you need to spin up those old VMs, do what you need to do, and put it back on the shelf.
Its just the inconvenience of having to lug around multiple machines, and backup multiple machines - its nice when everything you need fits under your arm, but you are right - I could offload my old VM's, and may need to do that at some point.
