I'd add consistency to the benefits: when I need leftpad and declare a dependency on "big bag of string stuff" for it, chances are high that codevelopers will p

I'd add consistency to the benefits: when I need leftpad and declare a dependency on "big bag of string stuff" for it, chances are high that codevelopers will pick it up when they need rightpad. Because the very first step in every library decision is "do we already have a dependency for that". Bespoke implementations would tend to end up all over the place.