Interesting, but I don’t think I’ve ever had a layer shift on my printer that wasn’t from the print bed moving.
For the cnc, I wonder if it’s even a good idea. Difference is that the stepper is connected to the workpiece via belts, tube, spindle, endmill. That makes the endmill the weak spot. And if it isn’t, then aren’t we skipping steps because the endmill has gotten dull or the cam is bad? I’ve had bad cam make me miss steps and then on the next pass it takes so much force it actually moves the workpiece under my clamps…no fix for that.
I guess I’m just asking for a scenario in which these save the day. Hidden knot in the wood?