> Also being a functional language it is easy to crank out features in an afterthought. I am a big fan of functional languages, but I don't take for granted th

> Also being a functional language it is easy to crank out features in an afterthought. I am a big fan of functional languages, but I don't take for granted that they allow us to crank out any additional feature easily. The ease of adding of undo/redo functionality is a common selling point, but it seems to fall out directly from a preference for immutable data.