I have specialized in photographing Classic Cars and Race Cars, so they currently form 22% of my entire portfolio. My question is, how much is too much, and at what point, does this become counter productive? Given the immanent demise of the petrol engine, the rise of EVs, ULEZ, global warming etc. I feel I am recording these vehicles for posterity and for future historical records, as they form a large part of our history, culture and heritage.