Rugani and Romagnoli are defenders, them and Donnarumma will be the heirs of Chiellini, Barzagli and Buffon.
The in-between generations were a disaster, Bonucci is more of a CM than a CB, he couldn't defend, couldn't tackle, couldn't man mark. After Messi and Iniesta all the small children aspire to become like them and defending was overlooked, I'm glad that we have one of the rare boys that can defend and that he can learn among the best of this kind!