Learning to breathe fire

I recently read “Learning to Breathe Fire – The rise of Crossfit and the Primal Future of Fitness” by J.C. Herz. It’s a fast paced, interesting read and it’s got me intrigued about Crossfit and its potential benefits compared to the training that I currently do. I’m already familiar, experienced and onboard with lifting heavy things (both external resistance – barbells, kettlebells etc and bodyweight calisthenics), sprinting and high intensity interval training (work capacity). But it’s raised lots of questions in my head.