Did he make a clear statement on cost? On a skim of: https://newsroom.intel.com/wp-content/uploads/sites/11/2018/... I see costs mentioned - but I can't immediately see a clear statement - to tie it in with transistor increase - but I might be overlooking something?

On page two he charts cost per transistor dropping roughly an order of magnitude every 5 years. Since the the "law" of doubling transistors is on a two year time span, this roughly matches.