More "MIDI Devices" please

Did a search for “midi devices” in the Feature Request section and surprised that nobody else posted this…or at least that I could find. The list of MIDI devices seems a bit paltry compared to Sonar, for example.
Steinberg seem to have stopped adding others besides Yamaha quite a while ago…eh?
For example, there are no Kurzweil PCs represented, no Roland VR-09, no Smith Prophets or other keys or modules of his. Any good reason?

… and no Drum maps for them… Sonar has a very long list of drum maps…