Part of the complexity is that there are Win32 APIs that allow applications to add UI to the Windows 95/2000-style control panels. In order to keep compatibilit

Part of the complexity is that there are Win32 APIs that allow applications to add UI to the Windows 95/2000-style control panels. In order to keep compatibility with those applications/code the control panels need to be kept around. It may be possible to provide an updated UI while still allowing the existing APIs and applications to work and integrate with the control panel, but it is not straightforward.