Why didn't Microsoft launch Windows 9 and switch to 10 directly?
Microsoft did not release Windows 9 and launched 10
Because of a lazy programmer
Everyone was surprised that the next Windows 10 is not 9, and the attendees at the Microsoft conference first asked about this bypassing the number 9, and Microsoft officials answered an answer published in the detailed coverage, but it seems that there is a technical reason for this and it dates back to Windows 95 and the user says Cranbourne on the Reddit website Which claims to be a Microsoft developer that when external applications scan the operating system on the device to make sure that it is either Windows 95 or Windows 98, as it uses a simple conditional code to shorten the time, as you search for a name that starts with Windows 9, the available possibilities are Windows 95 and Windows 98 only. Therefore, if the name of the new system is Windows 9, there will be three possibilities, but the programmatic condition takes into account only two possibilities.
In order not to modify the software codes previously and to prevent conflicts and additional problems, Microsoft bypassed the naming of the system Windows 9 and chose Windows 10.
Engadget indicated that the same software problem occurred 20 years ago with Windows 2000 and some Pentium processors at the time, but it affected a small number of users. And now, to avoid any potential problems with the number 9, Microsoft has completely surpassed it to 10, which can also serve for marketing and advertising purposes, as the company believes that the system comes with the advantages of systems 7 and 8, so the jump was important to offer something new and unprecedented. Of course, Microsoft did not comment on this interpretation, nor did it confirm or deny it.