May Developers as me, are using VMWARE Workstation instead of Hyper-V in their development machines. I think It is very important to have ability to use MSIX tool in that configuration.
As Hyper-V and VMWARE can't so exist, it is one more reason to support it.
Also VMWARE Support snapshots, and in complex installation scenarios it is possible:
1) Take a snapshot before installation
2) Install software, (as many step as necessary)
3) Take a snapshot again after installation and compare it to initial state
So, we have all data to make installation package.