Large increases in cost with questionable increases in performance can be tolerated only in race horses and fancy women.
Lord KelvinSymmetrical equations are good in their place, but ' vector ' is a useless survival, or offshoot from quaternions, and has never been of the slightest use to any creature.
Lord KelvinQuaternions came from Hamilton after his really good work had been done, and though beautifully ingenious, have been an unmixed evil to those who have touched them in any way.
Lord Kelvin