I’ve always preferred 6 buttons. But its a hassle with some games needing them like SFV for menu’s. Also I preferred the Dreamcast Agetec layout where the stick was a little further away from the buttons. The current standard seems to close together for my taste.
As for the old days, up SF4 and SFxTekken on xbox 360 I was still using the default SNES layout with Fierce and Roundhouse on the top LB/RB.
YXLBAR 4 lyf.
Maybe I’ll look into a mod to put some 24mm buttons on the side to compliment back/start and move the triggers over.