[amiga386]

The utility function just has to fit your use case, and can be easily refactored as it lives in a local context.

The package has to have a public API, meet millions of different people's use cases, and any change to the API will cause millions of man-hours of useless work... and yet if it's a poorly designed API, it might cause millions of sub-optimal programs.

Every project has a StringUtils file. But every project's StringUtils file is different.

Published packages in an ecosystem ought to be well-designed, with good performance, good APIs, good security. Packages that don't meet that bar ought to be kept out. npm is jarring because it let any old shit get published, despite there being long-standing package ecosystems in other languages with much better standards, that they could have copied from (CPAN, PyPi, RubyGems, Maven Central, NuGet Gallery, etc.)