It doesn't help at all on notebooks which of course are the subject of this discussion, or even nearly any Apple hardware at all at this point. But FWIW on syst

It doesn't help at all on notebooks which of course are the subject of this discussion, or even nearly any Apple hardware at all at this point. But FWIW on systems that can support multiple GPUs using PCIe passthrough to a macOS Guest VM will make it perform very well. Of course legally that means only the now highly mediocre multi-year old price-unchanged Mac Pro. But running a hackintosh virtualized can work quite nicely. While very unlikely, perhaps this will become an officially possible option again someday if Apple ever does another expandable system.