If the implication is that you still can sound two or three strings, top note only - absolutely useful,
ANYTHING you can choose to toggle as part of a patch/performance setup is useful to somebody. Maybe not me, but someone will see a musical use for almost any bizarre configuration (like a sarod…)
Outside-the-box suggestion. Take a look at the (now aging) mAudio Axiom keyboards. Here is a link. The options they give for their knobs, sliders and keys is just ridiculous! One patch I have pressure-sensitive drum pads, the next they are preset controllers.