I just ordered two all-wood staircases to replace the steel spiral monstrosity that was built into the house where I live from the beginning. It was unsafe, unstable and way too steep so they really had to go. But the stairwell is a weird shape, there is partial overlap with the front door and the direction of turn had to be reversed. Enter the master carpenter who spent a 1/2 hour to measure up the stairwell and who then proceeded to create two new complete stairs that fit to the millimeter and solved all of the weird problems in one fell swoop. It wasn't cheap, but given the challenges and the materials used, the fact that they will probably last another 60 years or so and that they look amazing I figure that it was well worth it.

No way you could automate that kind of ingenuity. So, props to your dad, and there are more people like him still doing this work today.