How would the teachings be classified according to what seems to be the earliest scheme of classification?
suttaṃ, geyyaṃ, veyyākaraṇaṃ, gāthaṃ, udānaṃ, itivuttakaṃ, jātakaṃ, abbhutadhammaṃ, AN4.191
“statements, songs, discussions, verses, inspired exclamations, legends, stories of past lives, amazing stories, and classifications.”
And, if the Buddha found it adequate, why was it replaced with the current system of classification?!