Exactly. A few days using HyperV for my linux desktop guest was enough to convince me that I didn't need Docker for Windows THAT bad. I'm back to Virtualbox.
Portability of VMs shouldn't be overlooked, it's why VMware is still quite relevant and why when that is out of the question Virtual Box is very popular.
If my VMs can't easily be run on any host from backup they tend to be quite useless at the most critical of times.