Is your clear faith in industry at large "leveraging powerful programming language features to massively increase developer productivity" substantiated or just taken as a given because it makes intuitive sense?
If a powerful language allows you do the same thing with 10x less code, you'll also have up to 10x fewer bugs (in practice maybe only 2x fewer, but that would still be huge).
This happens when the original code was clever to begin with and someone (else) came try to fix an edge case and lo and behold.