This is essentially my argument. A lot of people seem to start out gaining skills in design and development, as needed by their job, but as they gain experience

This is essentially my argument. A lot of people seem to start out gaining skills in design and development, as needed by their job, but as they gain experience they always tend to go into one camp. I know plenty of people that class themselves as both designers and developers, but few at senior-level that would consider themselves just as good with either.