Do you know of that instant update feature in Excel? It automatically updates cells when you alter one, up to a certain performance point. My MacBook (non anything) stops doing so much faster than when I use a desktop. When I do process a line of heavier formulae I do have to also wait a fair amount longer than when I use a larger machine.

And the pretty penny argument does not really hold up when you are talking about it as a company expense, due to the very favorable tax perspective.