[Great68]

For me, I don't think it's that I really "grew out" of anything, it's just that new hobbies came along (Boating, Camping, Gardening etc) and are competing for more of my time.
Like, I like cruising the boat as much, (and for various reasons) maybe even more than cruising around in my car.

In my 20's, I could spend time working on and aimlessly driving my car, because I had twice the free time that I have now and not as many other things I was into doing.