It would be great if macro lenses had motorised MF, which could be remotely controlled via a phone app or computer, thus avoiding human contact with the camera.
And as you get toward macro range, you are likely not to want to move the focus, and change magnification, or rather set the magnification with the focus ring and then move the camera to focus on what you want. That becomes even more important with stacking. I'm not likely ever to need a motorized rail, but I can imagine how that might be handy.