- frameworks like react or express and extensions for the same
- meaningful libraries like axios, ramda, date-fns or qs
- transpiler/bundler enhancements like webpack loaders or babel presets
I would prefer that the JS committee focused on bringing meaningful new capabilities to node and the browser that are currently lacking, like they did with the various HTML5 libraries, fetch(), ES classes and so on, rather than providing tiny functions that aren't even providing new functionality (array indexing is easy and idiomatic in JS). If there was no opportunity cost then sure, add tiny pointless builtin functions all day long.