I'm not so much shocked as mystified. I did a bit of Google searching to try to find out what flash options are available to attach to DMF cameras, and couldn't find any satisfactory answers. I checked out the Phase One site where there are lots of video tutorials on the Phase 645DF, but the only reference to use of flash related to external units.
A Hasselblad H-series has a few flash options (I'm not sure about the other MFs but I quess they have something similar)
- built in fill flash with TTL
- hotshoe where you can mount normal flashes and with the appropiate adapter a TTL flash
- PC plug where you can mount cord base flashes
All these flashe options syncs to 1/800 - well there is only one case that I know of where you dont have max sync speed and that is when you use slow wireless remote triggers but that is not really the cameras fault.
When using faster sync than the flash duration you don't get the full benefit of the flash power.
You can choose to sync the flash in the beginning or at the end of the exposure, which is very nice when shooting moving objects leaving the ghosting trail behind the object instead of in front.
I have been following this thread and find it very entertaining even though I have difficulties seeing what its actual purpose is. I seems that the OP ask if MF is too expensive, too heavy, and too unflexible to be worth getting and as the thread progresses it appears that the question is more rethorical than actual.
To me it's like asking: Why does anybody wan't to buy a 18 wheel truck - it's heavy, it's very expensive, nobody else buys it, it doesn't run very fast, it's difficult to drive and even more difficult to park?
The best answer I can come up with is a few people needs it's ability to move stuff and a few freaks just like to drive it. I wouldn't recommend it for a sunday drive unless ofcourse you mostly enjoy destroying your environment.