Well, as a user for rendering/phyiscs at least I started to like the use quaternions instead of vectors because some operations are just plainly easier and can

Well, as a user for rendering/phyiscs at least I started to like the use quaternions instead of vectors because some operations are just plainly easier and can remove the need to apply them in a certain order compared to vectors. This is from practical experience when the heavy math is abstrated away. Numerical math was scrapped in my naive CS math curiculum, but I think some operations here have a greater numerical stability for practical purposes. Heavily reminds me of the pi/tau debate, or proponents of the dozenal system. This is what professinal attachment can do to you.