People like that have sever muisconceptions about what it means to "grow up". Growing up doesn't mean leaving behind thungs you loved as a kid, it simply means re-prioritizing,re-evaluating and re-organizing those things to find where they fit in your life now. That's all. You might not have as much time to do the things you loved, but that doesn't mean you stop doing them, you just have to devote less time to them.
I'm turning 30 in November. 30. But I still like things like Digimon and KH I still play and watch them and I'll never leave them behind.
Thanks for understanding my feelings on this and me and you both i would never ever leave them behind either .