I can't see Sonalyst being even slightly interested in the WW2 market. Besides, their games have been just as buggy, but without the DRM ... which is just like SHIV.
No you are quite right unfortunately, the poor sales of the very good but hardcore Dangerous Waters pretty much killed off the interest from Sonalysts in continuing. And it looks like it might well be the end of the road for Ubi now too as far as Silent Hunter goes, a real shame as it was a series I have always enjoyed and once modded up a superbly atmospheric experience.
I wonder if Derek has ever considered doing a WWII naval simulation game? I'm sure that would be quite something in terms of depth & detail and something I'd really like to see.