IF is most definitely a "lifestyle change". There are so many benefits to it other than just the obvious physical changes. Its a hassle and time consuming to eat multiple times a day. IF takes that out of the equation by only eating 2-3 meals a day, so less than half of the meal prep and eating time. Even while "cutting" I get to indulge which is nice, and nearly every workout day feels like a cheat day. Its nothing but win for me all the way around.
I remember times in the past on traditional diets where I would bulk up during the winter with quite a bit of fat gained, then cut up in the spring spending a good 3 months or more getting to a reasonable level. No more! Now I am leaner than I've ever been, and still was able to add 15 lbs to my frame during "cutting season". When I go into winter I will add more, but I will always stay in single digit bodyfat ranges thanks to IF