You observe this with types. Dynamic types feel faster, at the REPL, when you’re coding at 1Hz, because you’re not factoring in the (unseen) cost of future bugs, the cost of refactors you won’t do because you don’t have the confidence to refactor which static types give you, the cost of legacy software that can’t be replaced because it can’t be understood by anyone, the cost of a Python server doing four requests per second while you pay five figures to AWS every month.
