It's still handwaving from a twenty-thousand foot view, whereas the devil is in the details. I don't see how his thesis addresses the very large difference in

It's still handwaving from a twenty-thousand foot view, whereas the devil is in the details. I don't see how his thesis addresses the very large difference in lifespans for different species, first and foremost. Secondarily, although he addresses the body's repair mechanisms, I don't see how he puts a new limit on their capacity, unless I overlooked it, or unless he thought things like the Hayflick limit etc. perfectly address that (which it does not completely do).