Sure! But the same is true of Word, or CSS for that matter. Any layout system is going to run into this issue: since the space of possible layouts is so big,

Sure! But the same is true of Word, or CSS for that matter. Any layout system is going to run into this issue: since the space of possible layouts is so big, it's almost inevitable that users will decide they want something that isn't well supported by the system. If the system is sufficiently powerful, they will be able to achieve their desired layout, at the cost of wrecking usability / maintainability. MS word is also perfectly usable, as long as you don't try to do anything weird (as the example in the article illustrates!).