VirtualBox runs fine under Windows 10.
Yes, of course. The rationale for Hyper V is that I have built images as VHD files in Hyper V on my laptop first, added the differing trunks I use and removed the auto created extensions / groups etc that are in Incredible that I don't use, then move them onto a server when I upgrade or deploy a system (I have a half dozen or so to manage). If I use virtual box, I have to take the file and use either dd or a tool to make it into a VHD file then fix the drivers etc when I drop it into Hyper V. Hyper V does replication (even for free on the free version) which I can use for failover, standby, and a sort of backup, but even better I can use Hyper V to replicate then break the replication and setup the backup/restore functionality between two datacenters which gives me 100% the same. Then, I configure my carriers and phones for fail over, and I have a fully hot standby system (which so far this year in one instance has been used twice!).
So I can appreciate the MS haters around (I myself curse them from time to time) but practically speaking this is a rapid way to deploy and move systems between hardware and provide lots of redundancy. Added bonus it also runs my AD / Exchange / other stuff on the same platform and it's included in the license price for Windows . . . it works for me. You can even get dynamic memory to work in CentOS now apparently with a couple tweaks, though memory is cheap so lately I haven't had to use that.
Anyway, feedback - I spent some time playing a bit - got a couple weird web interface errors (500 type errors) when activating CID Superfecta and OSS EPM, but I just refreshed the page and started again and it worked the second time. Quite possibly a browser compatibility issue and not reproduce able yet. Core functions (extensions, ring groups, trunks, etc) all programmed without any issues.