I'm 31, my company also contracts a dev that is almost 60. He knows much more than me about architecture, old systems that we still use, I would not want to do

I'm 31, my company also contracts a dev that is almost 60. He knows much more than me about architecture, old systems that we still use, I would not want to do his work. I work on the newer stuff. As I get older I plan to shift to a different role. Maybe management, I am waiting for a position to open in a city for a dev project manager. I'm not really concerned.