I was looking at film emulation in digital photo processing for a minute yesterday because of the DXO sale, and it struck me again how funny it is to have a defined emulation preset for black and white film, because those presets are mostly about contrast/curves and the film stock itself is like 1/3 at most of what goes into the contrast presentation of a black and white photograph. (The biggest factor is printing, which reflects the limitations of available materials/target medium and the choices of the printer, with development recipes and exposure choices also playing a big factor.)
You can make, e.g., Tri-X look like almost anything, so if you emulate it, what are you emulating? A perceived consensus of how the film stock was normally used in its heydey? (DXO's film dingus does a clever thing where they let you pick from a "timeline" of historical images to emulate, which probably gets much closer to how people actually want to use such a tool.)
(Grain structure is a different story, although most digital attempts at grain emulation do not actually look/behave like film grain.)