Hallo Jürgen,
Nice pictures, thank you.
Technical cameras (i.e arrangements that allow the plane of the film/sensor to be tilted with respect of the image plane) are still present, but get less often used, as they remain religiously kept form dust, or sold cheap on an auction platform ...
Several reasons for that state of affair.
One could say almost the same about MF, even though I have the impression that this type of camera remains widespread in some segments of prof. photography as well as with those who cherish MF.
Years ago, I sold all my MF equipment to finance high quality scanners that were needed to digitize my (and those of others) collection of pictures, ranging from 24mmx36mm to 60mmx60mm. When I was done with that, I started to digitize my collection of 4x5'' pictures as well. My Sinar is stil "in use" once or twice a year for a particular project. Shooting is analog, and the film material gets scanned after that. I do not use this path often enough to justify the investment for a digital back.
I'll post a pic here as soon as I have access to my repository. In the meantime, enjoy your week, Philippe