Its a good point that NT was a successful rewrite. However, its worth noting how this was done. NT was originally aimed at a different market, there was a overl

Its a good point that NT was a successful rewrite. However, its worth noting how this was done. NT was originally aimed at a different market, there was a overlap of several years where the old system was still available AND NT ran Windows 3.1 apps in their own subsystem which contained .... the codebase of Windows 3.1.