There are guitar pedals that have toggle dials (? dunno if that's the correct term). But they are dials for things with several discrete settings (usually more than the two or three that a typical dipswitch can handle).

Off the top of my head, the JHS pedals where they pack like 7 or 8 versions of an OD circuit into a single pedal (Bonsai, Muffaletta, PackRat), all have such dials. They click into place and there is nothing in between. And it works just fine.

Old television dials also come to mind. Discrete channels with nothing but dead air in between.