For me the key sentence to the whole article is "Your boss has no idea if you’re good at your job." Why do we do such a bad job of developing people who are good managers/leaders AND understand technology? There seems to be this idea that IT folks are "special" and don't understand business and, because it's always been that way, there's no need to change. If you work for a business, it's not OK to be a not have a clue how a business works.