Exactly. Developing an operating system for example still has the same ratio of essential complexity to accidental as it ever did and guess what: OSs are still

Exactly. Developing an operating system for example still has the same ratio of essential complexity to accidental as it ever did and guess what: OSs are still written in C and assembler. Has there been an order of magnitude improvement in productivity because of program language design in either of those two languages since 1986? Nope.