Let's see; I already have standalone screwdrivers, can openers, pliers, wire cutters, chisels, files, utility knives....If you went to a tool store and they sold a standalone version of a tool on your multitool, would you buy it?
Me neither.
Nope, I probably would not buy it, but only because I already have acceptably decent standalone tools of most of the ones on my multitool.