At 35, I'm definitely starting to feel more like a grown-up than I ever have. There's nothing in my life that is childish or whimsical. Having fun is fantastic and I never want to lose a sense of that - and also, I think, you have to have that to put into your work or else it's going to feel stiff.
The organizational architecture is really that a centipede walks on hundred legs and one or two don't count. So if I lose one or two legs, the process will go on, the organization will go on, the growth will go on.