That's funny, I actually am more drawn to being a polyglot as I get older. Part of this is to keep my mind nimble and myself excited, as I was when I first started learning things as a young adult.

Also, I think as I get wiser (I hope), I'm realizing more and more the precept of "when all you have is a hammer." It also helps that I'm decent enough in the things I've specialized in that I can learn new things with the purpose of supplementing the deficiencies in my specialties...which makes learning those new things both easier and more profitable.