Comment by testdelacc1

This is harder than it sounds. Look at the amount of effort it took to standardise temporal (new time library) and then for all the runtimes to implement it. It’s a lot of work.

And what’s more, people have proposed a standard library through tc39 without success - https://github.com/tc39/proposal-built-in-modules

Of course any large company could create a massive standard library on their own without going through the standards process but it might not be adopted by developers.