In my real-world tool kit for household use, I've got a configurable screwdriver with multiple heads of various sizes and shapes (slot, cross-point, etc.). I also have a bunch of conventional screwdrivers. I use the latter far more.
Opposite anecdote: I have a bunch of conventional screwdrivers in a toolkit, too, but I also have a single configurable screwdriver in the kitchen in a drawer. Rather than going out to the garage to dig through the toolbox, I find that most of the time I just use the configurable screwdriver. It's not as good at actually driving screws, but it's faster to change the head and do whatever needs to be done.
But when you come across a Torx screw, I bet you're really happy you have the configurable screwdriver.
Actually I have a Torx screwdriver too -- and the multi-head configurable screwdriver doesn't.