Form vs Function
Industrial design is the design of products to arrive at form, function and manufacturability. There was a time when cars looked different:
Lincoln (expansive),
Volvo (staid),
Beemer (teutonic),
Mercs (elegant),
Citroën (élan). Nowadays they tend to look alike in part due to a dominance of function over form eg. streamlined and rounded to minimise drag. For bike designers, drag is less of a concern, and with no 'skin' and little form to work with, attention falls on the details as in the headlight and handlebar assembly of the
Kona Splice-E electric bike above.