"The most important thing is not to constrain the evolution of your ideas. So the less you commit yourself in writing to what your data structures represent, t

"The most important thing is not to constrain the evolution of your ideas. So the less you commit yourself in writing to what your data structures represent, the better." Exactly! I think most developers don't get this statement. Committing yourself to data structures is like mixing cement IMHO. Once you've started this get harder to change quickly.