" take note DSLR manufacturers 35mm is out of date."
As long as lenses project circular images, going too far from square images just waste a lot of the image circle. You may use anamorphic lenses, but they have some disadvantage as well, especially for a SLR.
Nor for stills panoramic formats are always good, it may be very difficult to frame in a good way many subjects. There's a reason many depicts are the format they are.