The author makes a great point and something I've been struggling with. We have so many great tools and with tech constantly improving it makes it hard to focus on a single topic area. Personally, I've gone through so many tutorials on so many different languages and frameworks (Obj-C, javascript, python, ruby, etc etc etc) but have never really focused on a specific stack. I think the most important for any new developer is to choose an area like web development or ios programming and focus on the fundamentals of programming. It's just like learning a foreign language, you're never going to be able to speak fluently until you do it everyday for months or years.