I like to imagine the in-world reason for Pathfinder ditching spell-schools is that everybody held on to this ancient Thassilonian system, and then the actual Thassilon starts showing up again, and we see how different they are from the mythology and go “oh, this whole taxonomy is gobbledygook.
“In retrospect yeah, some wizard despots who lionized their own personality flaws all declared the kind of magic they liked to do an innate classification, and we all just went along with it. Gods’ sake, half these ‘schools’ do 6 unrelated things, but DIVINATION is their waste bin taxon?”














