The old 'bent arm' stuff came along when they started making bows with ultra low brace heights. You shot a bow with a 5" brace with a bent arm to get your forearm out of the way. Otherwise it'd rake the hide off your arm and string contact would throw the arrow off into the ozone. Thank goodness THOSE days have come and gone!

I shoot with a little crook in the elbow, but not much. Basically the same exact arm/low wrist grip position I use to shoot a longbow. You did know the're putting longbow style grips on compounds these days, didn't you?

On the old pistol grip type handles, I use more of a recurve style shooting form, straight but not locked elbow and medium wrist grip.