Brendan Eich paraphrasing the committee in charge of JavaScript: TC39 believes we are least capable compared to the wider ecosystem (GitHub, etc.) in designing, user-testing, polishing, and finalizing APIs. We can do final polish and formal specification, for sure. Y’all should do the hard part, not because we are lazy but because you are many, closer to your problem domains and use-cases, and collectively wiser about the details.