I don't find it that limiting. I do use 1/1000 sec and higher sometimes with 35mm for handheld flight shots of birds with a 400mm lens, but that's not something I do very much of with medium format, just because the lenses aren't long and fast enough, and aren't easy to focus quickly that way (though I am experimenting a bit with MF for birds).
If you need a wide aperture and run out of shutter speed, use slower film or an ND filter. With interchangeable backs, slower film is usually the best option.
Now my 5x7" Press Graflex goes up to 1/1500 sec. I've got to shoot a bicycle race or something and see if I can get that Lartigue effect.