[AlexandrB]

I thought the only reason they went from 8 to 10 was because "Windows 9" might be a match for application regexs trying to match Windows 9x.

Edit: https://www.extremetech.com/computing/191279-why-is-it-calle...

[JohnTHaller]

That was a big part of it. I know a lot of software did the lazy check for that versioning-wise back in the day.