WHere have all the flower children gone?

This question is closed to anyone under 40 please. Also try to keep it from being partisan. I know the left thinks they sold out and the right thinks they grew up. I am wondering on an individual basis, why did the children of the 60's who didn't trust the establishment become the establishment. From hippies to yuppies. And how did the generation of the environment and ideals become so close minded (both left and right wing)and stop caring. I would love to hear a former flower childs response of how they changed?