Grassmanian.jl looks quite nice and you are right to be proud. I’d add some examples of “applications” to demonstrate how this abstract formulation “adds value”.
Differential Geometry is a topic that’s oversold: most PDEs are 3D at most and so it’s never been clear to me why differential forms are any better than div and curl. So any negativity is because of this underlying context, don’t take it personal. Doing the extra effort of making real world examples will help address that.
As a counterpoint, Taco is much clearer what it does and why it might be useful, and I don’t have to learn what a “multivector” is.