Why not call Windows9 but Windows10?

Not long ago, Microsoft released a Windows 10 preview version of the next-generation desktop operating system. This time, Microsoft seems to have made a small joke with everyone, and the rumors of the version of Windows next-generation products are Not everyone thinks of Windows 9. The name of the new system skipped a number "9", directly using Windows 10, this time Microsoft made up its mind to return to the classic Windows start menu.

Microsoft's next-generation system named Windows 10
According to the rules from Win7 to Win8, people naturally think of a new generation operating system called Win9, but Microsoft has named it Win10, in order to adapt to the Internet, Windows will Becoming an upgraded operating system with a faster pace, the era of launching a generation of operating systems in a few years has passed. So the future naming of Windows is likely to be, Win10.1, Win10.2, etc., similar to Apple OS X.
Why not call Windows 9?
Someone might think Windows 10 is unexpected. However, Microsoft executives hinted at skipping the "Windows 9" name because Windows 8.1 is equivalent to the so-called Windows 9. Microsoft executives say that when you see the entire product line, you will find the name appropriate. It is not difficult to understand from the semantics, in fact, it implies that Windows 8.1 is equivalent to Windows 9.
If the developer is using it, but the version number starts with Windows 9, it is considered Windows 95, 98 or others. This means that the next-generation operating system, if called Windows 9, may be recognized by Windows as a Windows 95 or 98. At the same time, third-party software may not function properly. In other words, the programmer of the year judged that if the operating system name contains Windows 9, it is judged to be Windows 95 or Windows 98. Because these softwares have been in use for many years, it is no longer possible to modify the code for the new system. If Microsoft uses Windows 9, it will cause a lot of problems in the legacy software set. According to analysis, for this reason, Microsoft decided to skip Windows 9, directly named Windows 10.