Wow, I'm supprised at all the false reasons, that are based on incorrect assumptions. For example, "bad design is expensive", the assumption is that Open Source has bad design. The assumption also is that Closed source is therefore good design. How can you know that a piece of software you can't see the source to has a better design than one you CAN see the source to? Just wow.
edit: to add to the expensive note: paying for a license yearly for eternity is supposidly cheaper than free?