Notwendy

Hi all y'all, does anyone know if there is/was a benefit associated with one shank style over another? Or were they design choices based on changes in the market (i.e. midcentury aesthetics, etc) or to differentiate themselves from rival makers (They have a high shank? Well, we have a Super high shank. With a slant!)?

I currently have several low shank, two high shank, and one super high shank Kenmore and can't really see the difference beyond outward style of the machine. Just curious. : )