Roger Penrose&#x27;s Road to Reality makes use of Clifford Algebra and Grassmann Products, so at least some serious physicists are using it seriously.<p>Even though I had come across it before, I had a real revelation when I read David Hestenes short paper on it (from Bret Victor&#x27;s website) <a href="http:&#x2F;&#x2F;worrydream.com&#x2F;refs&#x2F;Hestenes-ReformingTheMathematicalLanguageOfPhysics.pdf" rel="nofollow">http:&#x2F;&#x2F;worrydream.com&#x2F;refs&#x2F;Hestenes-ReformingTheMathematical...</a>
It is indeed beautiful to see how complex geometry and vector fields are connected via GA. I found especially revealing the relationship between electric and magnetic fields. I agree with the article that whatever its absolute merits, it would be a good way to teach new physicists. I have already ordered my copy of &quot;Clifford Algebra to Geometric Calculus&quot;.<p>Whether it is actually more practical to do work in General Relativity or Quantum Mechanics, or indeed Quantum Field Theory etc., I&#x27;ll have to leave for the experts in those fields. From an outsider&#x27;s perspective, it is a delight to understand some of the connections between different disciplines in a more intuitive way.<p>In any case, I would imagine that GA is exceptionally useful for computer graphics and physical simulations.