Since you majored in maths and physics, you have a lot of specialized knowledge. I'd rather build on that than trying to compete with younger, better trained, more skilled people on "general purpose" development tasks. I once worked with a physicist and it was rather tiresome because on the one hand he had that "hey, I was at cern, I am the smartest guy around"-attitude while on the other hand he was ridiculously incompetent when it came to solving basic tasks.
