I will explain what I mean by motorised. Instead of, or rather, on top of, focussing by hand, it is very handy to focus (the rear standard, I should point out) by software, as you can then focus very accurately from the software without touching the camera.
Once you focus, you can then calculate (or ask the software to calculate) the necessary number of shots for focus bracketing and proceed to move the rear standard automatically in a sequence and shoot in equal intervals.
This is focus stacking but on a view camera,. i.e. moving the rear standard, as it has been previously discussed, which is of paramount importance in macro photography, also explained. This has nothing to do with Program exposure, it's just a facility to avoid human error, and to avoid touching the camera whilst you bracket at such close macro distances. It's a bit of a niche thing, and only important to a certain field of photography, therefore it is unlikely to be implemented on a view camera
I had to make such motorised view camera adaptation myself, including the software because you can't really buy it ready-made for the purpose, although Sinar are beginning to introduce it with their copy cameras, but it doesn't go far enough.
Having some engineering and electronics knowledge, I could market adapter kits myself, but I don't think the market is big enough to warrant such effort, you would need a substantial number of orders to make some decent money and photographers, generally, don't like to spend that much, they usually stick to their old routine, despite the inconvenience.
Edward