Re: A thought.
You forgot to click  Post Anonymously, but your comments are recognisable anyway.
> No, Microsoft are not charging by # cores for Windows 10. Only by CPU type.
And yet the Microsoft price list disagrees with you:
"""Update: An OEM price list shared with me by a contact shows the list price of Windows 10 Pro for Workstations (up to four cores) is $144; for more than four cores, $214."""