“WIN7 is probably the most stable and most secure of any of the WIN OSs.”
Obviously not according to this article.
... which was written by a source synchophantic to Microsoft's position that everyone should move to Windows 10. Just a little bit biased...
Microsoft is intentionally pulling the rug out from under Windows 7, but it's not because 7 is inherently bad, it's because they have more control over you when you use 10.
Windows 7 is the last Windows operating system worth using if you value having control of your data privacy. And even that will die off in a few years.