Circle vs Square Handles

I noticed that Synfig uses circle handles rather square ones according to rylleman its because circles are faster than squares, less air resistance. Then why is it the norm for vectoring programs like Inkscape to use square ones and 3D programs like Blender to use square ones?

I also use to say that red cars is faster than blue. You shouldn’t take everything I say so seriously. I don’t think any is better than the other, just choise of design.
Why do you dislike round handles? Except being different from inkscape I mean.

I use Inkscape for vectoring so circle ones feel weird don’t know why?