Youth in Adult Prisons

I recently read Bryan Stevenson's book "Just Mercy", which I thought was an incredible and important book. In this book, Stevenson talks about the abuse and asault that youth are often subjected to when they are kept in adult jails and prisons. I was shocked by the graphic abuses these youth face. I wondered how that issue was being handled modernly, and came across this article about the work a Senator is doing to get youth out of adult prisons and jails in Texas. I wonder what others in the MSC think about this? Should all youth/minors be moved out of adult jails and prisons? At what age should the cut off be at?