Kids change, things change. DS7 went from only wanting to go out of the house once a week to signing up for several academic type classes outside of school in the last few months. Will he ever go the reverse and want less again? Possibly. He's very project/subject driven, and although he loves to have friends, they have never been a huge driver in his behaviour. So long as it's largely what the kid wants, I don't think they'll feel overstretched.
It's good to hear from intparent about what can come about in the future, so some long term planning is called for.
