I really liked two of the poinst he made when answering audience questions. (1) In the expressiveness debate, only the upsides of increasing expressive power a

I really liked two of the poinst he made when answering audience questions. (1) In the expressiveness debate, only the upsides of increasing expressive power are discussed (avoiding global rewrites) but the downsides are not (breaking intuitive expectations). (2) The theory side and the UX side of language design communities seem to operate independently, to the detriment of the results.