That's kind of like saying "I can adjust the volume knob and the panning knob independently. The combinations are limitless!"

Even including the "secret menu" (extra sauce? no bun? extra patty?), the options are resetrictive. You're not going to end up with chicken nuggets or a salad or beef wellington.

And that's okay. They have a restrictive menu, and they're very good at what they choose to focus on. I'd wager that no other popular restaurant chain is more like Apple in that regard.