[vdnkh]

From a performance standpoint it’s way better to have stdlib grow as opposed to JS bundles. Modules aren’t shared within a page so you’d end up with a lot of duplicated code that the user would have to continuously download and parse.

[altmind]

The problem here you can only rely on stdlib when most of your users have runtimes with it. For the browser features, you may never live up to this.

Its worse to forever live with two implementations(native and polyfill) and as large bundles, double the troubleshooting effort and extra support.