I have changed my mind – but I would neither demonize nor praise either option. However, I have no problem saying it like that. The money factor was, of course, also decisive (although [KZP] is usually more expensive).
After all, I am installing gypsum boards on the upper floor as ceiling panels and not cement fiber boards.
Basically, gypsum is "dead" and has only one advantage, but it is essential: it is inherently smoother from the factory and fairly easy to make even smoother. But it also has the disadvantage that any flaw is even more visible.