To simplify, homological studies, while interesting and informative, are no longer, except for the still desperate, the “slam dunk” they were once thought to be for explaining, or part of, Darwinian processes. I am not saying it isn’t a fruitful area of study, nor despite it’s proven weakness as to explanatory power, that it is still appealed to. But it, by the field at large, is no longer felt to be or expected to be the critical part of the engine. Studies in the field of genes has emasculated it of it’s imagined power.