Why no Dall Kirkhams?

[Paramount]

Hi all
I don't know if this is the right place to post this but as it is related to imaging I thought I'd put it here. I am currently using a TMB 115 f7 for all my imagng and next year I am planning on getting A 10" RC scope (an Astrosib as it is now available where I live). As I always look around before I buy anything of that expense and while doing so I have noticed several firms doing optimised or corrected Dall Kirkham telescopes which according to all the advertising the design is ideally suited to imaging and in most areas out performs the RC scope. I appreciate that with a RC scope a field flattener will have to be added into the occasion especially if a large ccd chip is going to be used, this is something the corrected Dall Kirkhams don't need as the corrector is already built in.
My question is this, looking at all the forums and the multitude of fantastic and varied images posted, how come does it appear that none of the imagers are using optmised or corrected Dall Kirkhams? There are refractors, newtonians, SCTs, RCs, Cassegrains, camera lenses, Maksutov variations but no ODKs or CDKs
I would be very interested to see peoples views
Best wishes
Gordon

[Jaxdialation]

DKs are known for having an extremely small imaging area for any given aperture