Hello from Vietnam, I could say that I was a very passionate software engineer in the past years, but probably no more now. I suddenly got a huge interest in mechanics and physics and have digged deep over the past days on refrigeration, cooling, steam engine, energy etc. There are just some new machines on my mind that I really want to make. It even looks like I'm going to shift my focus to an entirely unfamiliar thing. Am I not being loyal to my profession? Am I doing a stupid thing?