I think one of the hardest things we had to hear when told our son had a heart condition, was that they really don't know what to expect in the teen years and beyond. As things grow, stretch and develop you can't predict how the scar tissue will adjust.
The arterial switch is a reasonably new procedure, with the first surgeries trialled in the early 80's.
So the fact our boy ( and many others) have made double figures proves a win, win for Heartkids!
I hope he has many more decades to come. And that we always receive nothing but good news from his cardiologist.