The 35 mm film gauge has long been the most common gauge in professional usage, and thus enjoys the greatest number of cameras currently available for professional usage.
Its robust image quality in relation to its size allows for a much more versatile, accessible, and affordable usage in many fields where neither 35 mm nor Super 8 would be well-suited.
Despite current challenges from the burgeoning digital video market, the consistent improvement of cameras, lenses, and film stocks have enabled the Super 16 format to flourish recently, with many labs reporting increased usage.
The format expanded the usable film negative horizontally, which required a larger film gate and necessitated either specialized conversion of machined parts or purchase of new cameras designed with Super 16 gates.
Since the format took more than a decade to slowly standardize, the competition from both high and low end video cameras has decimated the demand for 16 mm cameras for most non-professional usage.