Apple case is not exactly abandoning design for assembly. The advancement of electronic and metal machining allows smaller and more integrated parts, which allows cheap labor to beat the machine. If the electronics and metal machining did not advance, I am guessing the resultant production cost would not be this low.
I don’t think is true at all. CAM is dramatically more advanced than it was in the 70s - easier to use, and better algorithms mean much faster pathing. Costs are way down. Tooling is cheaper and more reliable.
Of course there's been quantitative improvements, but fundamentally everything that can be designed and machined today could be designed and machined in late 1970s using very similar tools, processes and control systems.
