I think your objection is a good one. Horizontal scaling in humans has low efficiency, so it's usually best to max out the benefits of vertical scaling first.

I think your objection is a good one. Horizontal scaling in humans has low efficiency, so it's usually best to max out the benefits of vertical scaling first. That being said, Scott Adams' career advice[1] seems pretty solid. In short, it is usually just as useful to be competent at three different things as to be extremely good at one thing. [1] http://dilbertblog.typepad.com/the_dilbert_blog/2007/07/career-advice.html http://dilbertblog.typepad.com/the_dilbert_blog/2007/07/care...