How much will the career of a scientist change?

I'm 15 and I want to go into the science career field. I know that the work they do changes constantly but I'm talking about the career itself. Will the purpose of a scientist ever change will they find new places to work, will they ever stop wearing lab coats, will they ever cease to exists(etc.), will the basics ever change cause I don't want it to, I don't like change I can stand a little change but I don't want the entire game to switch on me if you can understand what I am saying. Science is the career field I love. I know science itself and the problems will change but will the purpose and the principle of science change I know we will get more tech and stuff as time goes on but will the purpose change? I can't think of a better way to ask this question so please try to understand