Being all their ages didn’t change a lot for me (not sure how normal that is amongst those age groups). Except for Totoro which I watched when I was four if I remember correctly, I was roughly a preteen to teen when I watched all of them (or all the ones I watched, which is all but three) up to The Boy and the Heron (which just came out, I’m an adult now) which would only put me out of range with Ponyo and Porco Rosso when I watched those. Most people have a good sense of feeling for a story that adds up. I was little when I watched Totoro and little me had to stop myself from getting distracted from the movie itself.