Newer VirtualBox releases can run virtual machines on top of Hyper-V as a virtualization engine. It is slower than VirtualBox' own engine, but overall it is still a better experience than Hyper-V Manager.

Networking doesn't work properly if you do this. It's a mess.

disagree, it's unusably slow... i had to move to hyper-v vagrant driver as vbox, while it would boot the VM, was so slow it defeated any purpose on speeding up development