I think what people fail to appreciate, is that past a certain size, organizations and the people within them get so tightly wrapped up in working a certain way that it becomes nearly impossible to fix without rebuilding the whole thing from the ground up.

If you want to see if AI is paying off, look at new startups that build AI-native versus those that don't, controlling for the type of industry/product. This is a difficult causal inference comparison to make, but it's the one that I find most meaningful and interesting.