Dead horse discussion but I see a compelling reason to use the term “units”. New pilots deal with strange concepts like heading and attitude which, among other things, are measured in “degrees”. Angles are everywhere In a civilian pilot’s world. And the budding fighter student must deal with many more. In both cases, their Instructors fight a big battle early on trying to mentally separate attitude from AOA in the minds of their students. Using different terms for the two helps facilitate the separation.