Considering people always go on and on about the 4-2-3-1 doesn't work, how 4-3-3, 4-4-2 etc is better, it would really be nice if someone produce a detailed explanation on the intricacies as to why it doesn't work and the alternatives. Most, so far, are only scratching on its surface without necessarily going into details. It feels almost easy to say there's problem with this and that but not necessarily explaining in detail why so.