Geometric algebra is something that hasn't found a "killer app," if you will. The largest users of vector calculus are physicists and engineers, and those commu

Geometric algebra is something that hasn't found a "killer app," if you will. The largest users of vector calculus are physicists and engineers, and those communities have 1) enormous existing literature using Gibbs-Heaviside vectors, and 2) enormous institutional investment in teaching them across departments. We haven't found a justification for switching that would outweigh the amount of inertia involved. It's hardly a new thing. David Hestenes has been writing books about its advantages in physics since the 1960's.