Block partitions are assembled wet: mortar beds, mortar joints, and often a poured or sprayed secondary element at the head and around openings. Each of those interfaces is a material change. The block cures, the mortar shrinks, the cast-in element shrinks differently again, and the decoration on top has to absorb all of it.
The consequences arrive on a schedule. Hairline cracks appear along the joint lines in the first heating season; the paint is touched up; the cracks return. Around openings, where the wall is restrained by a frame, the movement concentrates and the crack is wider. On an acoustic wall the same joint is an air path, so the wall measures worse than its specification.
A dry system replaces the wet joint with a mechanical one: a track fixed to the structure, a stud in the track, a board on the stud, a flexible seal at the board joint. Each interface is designed to move a little without opening. There is nothing to cure, so there is no curing shrinkage and no waiting period before the finish.
The comparison is not about which method is more modern. It is about where the movement is absorbed. In a wet system it is absorbed by the decoration, which is the weakest layer. In a dry system it is absorbed by the joints, which are designed for it.