Someone on twitter wondered out loud how many different utilities and programs inside Windows are running a "Is Windows 9*" check. Interesting question that might explain the Windows 10 name.
If that were true it would show exactly how messed up the Windows kernel is. To drag compatibility from 1995 around is just messed up if it is linked to the "Product Name". Not the kernel version or even the working title. nope. The customer facing, cooked up by marketing, product name.