Yeah, probably a significant percentage. They're cheap enough that buying one, trying it out a few times, and then leaving it in a drawer won't bother you too m

Yeah, probably a significant percentage. They're cheap enough that buying one, trying it out a few times, and then leaving it in a drawer won't bother you too much. I think I've five (of different revisions), only one is in permanent use. Another is installed in a robot, and the rest are all collecting dust in a drawer or in a half-baked project bin.