that, plus you can now put it inside the bump slot of shadowcatcher, standard mtl, physical mtl, ... and it made no sense internally to keep it as integral part of material - it made the design slower and more ugly internally
I get your point as a programmer, but as an end user it's a step backward. Yesterday I hade to clean up and put materials on a very large and complex model coming from revit, and the bump map thing made the process a lot slower and a lot more boring. And, again, as an end user, the materials get a lot uglier (in the workflow sense, not visually) with the current solution. What I liked about Corona was that you could breeze through stuff that would take ages in V-Ray, and this smudges that a bit.
Would it be possible to have some sort of compromise? A tool that adds the rounded edges to the bump slot and combines it with the existing bitmap, if present?
Meanwhile, what is the best practice to put the rounded edge map together with a bitmap bump map?