At the company I work for, despite pushing widespread adoption, I have seen exactly a zero percent increase in the rate at which major projects get shipped.
This is what keeps getting me. People here keep posting benchmarks, bragging about 5x, 10x, 20x. None of the companies we work with are putting anything faster.
The evangelist response is to call it a skill issue, but looking around it seems like no one anywhere is actually pushing out new products meaningfully faster.