its a simple answer for those willing to listen: its called transition. the ability to use the vast supply that many already have as we transition to the new format.
why does Canon have CF and SD as does the D800 now thats not a winning hand either in my opinion. but there are many that may be transitioning from lower end models to this their ultimate one allows its use and for those using CF again coming from the other direction. the D800 will grab more then the D4 will and they know it. thus the difference in production levels.
i myself have been using CF since my coolpix 900. but i know it is a finite technology. SD just didn\'t have the juice to do it.
