[nittanymount]

my personal feeling, it is not easy to grow both breadth and depth. say, you are working on a project with a language/platform, if you want to be an expert on that, you will need to know it pretty deep with details... that takes your time. certainly many things are related, you will be easily jump to other language/platform. but your time/focus is limited...

some folks like to stay on top of more things in general (grow breadth), and don't like to dig a deep hole in one thing, certainly it does not mean they don't have the ability to do so...

guess, it is all up to your interest/time/focus... just do the best with what you are doing, really understand you need to understand, and learn more related for interest... that is probably the way to go. my 2c