[byproxy]

I love having the numpad available. It's just such a better way to enter numbers and do calculations.

[ken]

That's what an Fn key is for. You can add a numeric keypad right under where the user's hand already is. No need to make everyone type with their hands way off to the side.

[jjeaff]

Fn option is Not nearly as good. Keys aren't lined up correctly and you cant tell where you are by feel.

[kkarakk]

Context switching overhead