I don't understand the standard library argument at all. Standard library is always limited, there is always something that's not included - then what?

This has nothing to do with the JavaScript standard library but the insanity of NPM. There are modules that have even more dependents than `pad-left` despite being included in the standard library (e.g. https://www.npmjs.com/package/date-now, https://www.npmjs.com/package/is-positive, https://www.npmjs.com/package/is-lower-case)