Yea, I don't get it. I don't have a problem with hookless rims because I like wire-on tires anyway. But this article fails to prove to me why a hookless modern rim makes sense. Yes, it would be a few grams lighter, then you have to use a tire with a wire in it, probably negating that small advantage. The biggest drawback is that you are limited on the tires you can use.
Maybe I am missing something?