Some projects are meant to scope creep. Like this one. If the project manager of the swiss army knife had defended it from scope creep it would have 1 knife.
sewing and maintianing clothes was one of them, for example, so thats why it has a punch. They'd need to be able to open cans, as that was the most common long term ration, and they'd need to be able to maintain their rifles which had screws, thus screwdrivers.
a version with a wine bottle opener was made for officers and became common
Never realized opening a bottle of wine was so common to Swiss soldiers