Making large batches of the same board is absolutely faster; I'm having a hard time thinking of a single counterexample. I estimate each additional board I make

Making large batches of the same board is absolutely faster; I'm having a hard time thinking of a single counterexample. I estimate each additional board I make is only 10% more work than the time to make a single. Best example I've got is an 3D cubes design. Took me a week to make one of them, took me a week and a half to make 12, with less wastage due to division remainders. Sanding, edge routing, handles - all goes so much faster when I only have to set up the drum sander once, the CNC once, each grit on the the palm sander once... As for clamps, those certainly are not the limiting factor. Harbor Freight clamps are less than $10, can be exchanged no questions asked if (when) they break, and you can never have enough of them anyways.