I mean it in the most respectful possible way.  I picked up a copy of the old 2e ages and ages ago, and was recently delighted to learn that all the books are available for free download!  So I finally got my mitts on the 4th and 5th edition.  I think I prefer the 4th, because they made a teensy error with the 5th (that is, they retained references to sidebars that were not for some reason included...)