I have a fairly complete collection of both wood stock and metal body planes in the plane till, on the shelfs behind the main bench, and stuck wherever I can find room around the shop. Truth is you only need three bench planes, the rest are just a sickness.
While I like the metal body planes for the "middle" functions, most of the time for stock prep I will reach for a wood stock plane for no other reason than they are lighter and easier to use. For smoothing I tend to go back and forth with each type of plane getting about the same amount of use.
It is shaping where the small wood stock planes really shine. One of my favorite planes for shaping, for planing chamfers or round overs and such, is the little shop made Krenov style plane on the right side of the photo. It's not much good as a smoothing plane but for shaping it can't be beat by any metal body plane.
On the far left is a "Philly" single iron smoother, next to it is a Steve Voigt double iron smoother. Steve, as far as I know, is the only maker currently making double iron wood stock planes. I have three of his planes. They are a joy to use and are a bargain with reasonably short wait times. Next to Steve's plane is a double iron ECE, I'm not sure if ECE still makes this plane but if you can find one it is a steal at any price, if you do not want it email me. In the middle is a ECE single iron, I believe it is sold as a "Gents" plane, whatever it is a wonderful, light, nimble, plane to use on wood that does not need a double iron.
Today I used the ECE double iron to flush some pegs and final smoothing of the Sapele legs and the shop made plane to do some shaping to hide a couple of whopsies on MsBubba's small table. Without the shop made plane I'm not sure that the table's base would not have ended up in the burn pile.