On becoming a better developer (2015)
"Musicians get better by practice and tackling harder and harder pieces, not by switching instruments or genres, nor by learning more and varied easy pieces"<p>You do however becomes a better musician by playing different instruments, even if you're only really good with one. Learning drums as a piano players helps you focus on rythm precision.<p>I'd take a general developper that knows both mobile and backend over any specialized mobile developer anytime.