ok im haveing a small crisis rn...do you play league with 3 or 4 fingers?

i was looking at old boards posts, like old boards old(2012-13 shout-out to those of you who were on the old boards <3)

and i saw a bunch of threads on 3 vs 4 fingers: q,w,then index on e and r or one finger on q,w,e,r

i have always used 4 fingers and assumed everyone did but on those old thread the majority used 3

do people actually use 3 fingers?