As an example, a few years back I went on an intensive anapanasati retreat, where we worked with the 4 tetrads. There are a number of commentaries to the Anapanasati Sutta, two of the better known ones are "Breath by Breath" by Larry Rosenburg and "Mindfulness with breathing" by Buddhadasa Bhikkhu.
Larry's book is actually a commentary on Buddhadasa's approach, so in effect it's a commentary on a commentary and therefore arguably less authentic. But nearly everyone on the retreat had read Larry's book, and hardly anyone had read Buddhadasa's book, which I found rather puzzling.
It seems to me that often people are preoccupied with contemporary teachers just because they are contemporary, and sometimes just because they happen to be fashionable.