> All the Windows history tells me that backward compatibility is the killer feature of Windows. Backwards compatibility generally means you can use programs m

> All the Windows history tells me that backward compatibility is the killer feature of Windows. Backwards compatibility generally means you can use programs made for older versions of Windows on newer versions of Windows. What you want is the opposite of that: run a new program on an old version of Windows. Expecting that of all programs would mean no new OS feature or API could ever be used. Generally staying on an old OS means you accept that you don't get to use newer programs.