Why did Microsoft Skip Windows 9 [Rumor]

Few day back when Microsoft announced the windows 10 as their next version of Windows was the most unexpected surprised at San Francisco event.
However why did Microsoft skip windows 9 and jump directly to Windows 10.

One of the developer from Microsoft named cranbourne stated on Reddit that
Microsoft dev here, the internal rumours are that early testing revealed just how many third party products that had code of the form

if(version.StartsWith("windows9"))
{
      /*95 and 98*/
}
else {

and that this was the pragmatic solution to avoid that.

And if Microsoft named Windows 10 as Windows 9, then all classic apps with
above code will deal it as windows 95 or Windows 98. So that's why Microsoft skip Windows 9.