Concrete block, usually, is the structural core behind an aesthetic veneer. So the durability of the veneer application is, at the onset, dependent on the quality of the block work. The application of the veneer itself requires another skill, though related. Taken to highest level…a dry stacked stone wall can last centuries. Equate it to rough framing vs finish carpentry, there are few that have the “knack” or the temperament for both. ‘Same concept can be applied to anything really. “Quality is remembered long after price is forgotten”.