I am not a theoretical physicist. I have only done first semester college physics and I have read hacker news comments (and physics related articles) for years.

I am not a theoretical physicist. I have only done first semester college physics and I have read hacker news comments (and physics related articles) for years. However, I can assure you that if it was a simple as using the proper Maxwellian quaternions instead of the dumbed down Lorentz vectors to get a unified theory, this would have been done a long time ago. The comment you ask about seems to make no sense whatsoever. That is why you are having trouble parsing the comment and figuring out what its significance is.