The geometry of mathematical methods

Why "Geometry"? Seems to just be a math 101.

It seems to be the naming pattern chosen for a whole series of such publications: https://geometryof.org/

It'd be nice to incorporate links to Demos-3D to supplement visualizations of complex number algebra and 3D vector/matrix ops: https://www.youtube.com/playlist?list=PLfM6zMGnbgOHoJFFgqQ4O...

I always thought the notation of differentials is a footgun: