The article reflects my recent thoughts very precisely. Although a couple of gray hair help as a designer as well. I have recently witnessed that a combination of an experienced interaction designer and a young blood are a great team. They complement each other like yin and yang. The ability of rampant sparking neurons paired with a well established relationship engine.
2 years ago, i quit after 4 years of working as an interaction designer to go back to school and pursue masters in interaction design. I think it was the most I have learnt in a long time.