But I think 2000 introduced the "pro" licence/label, meaning it was aimed at business users. I can't recall there being a lot of "desktop pcs" or laptops with N

But I think 2000 introduced the "pro" licence/label, meaning it was aimed at business users. I can't recall there being a lot of "desktop pcs" or laptops with NT oem licenses, aimed at "business" users. So it's probably correct that xp cut over and abandoned the win95 codebase - but I also think 2000 marked the start of that effort.