[qwertfisch]

It’s almost not necessary. Windows has – in contrast to Linux – a very good and long compatibility guarantee. You can put up any program from 1995 (at least being 32-bit) and it will start and run.

The things GOG is improving are some bugs that occur mostly in games, e.g. something with color palettes in pre-2002 games. But I think every game using DirectX 9 or later will work without any adaptations, even ten years from now.