[Jare]

My understanding is that on Windows, VirtualBox still can't run along Docker For Windows, because DFW needs Hyper-V and VBox is incompatible. Is this still the case? I don't ask much of my VMs, but desktop Ubuntu guests under Hyper-V are very clunky.

[Ianvdl]

IIRC that is not something that VirtualBox can fix; I read somewhere that Hyper-V requires exclusive use of the virtualisation features of the hardware.

Note that this only applies to 64-bit virtualisation, you can still run Hyper-V and 32-bit VirtualBox virtual machines simultaneously.