We (I am on libs-api in addition to authoring the regex crate) specifically eschewed a batteries included standard library. The fact that `regex` was its own thing was the best thing that ever happened to it. It let me iterate on its API independent of the standard library.

fair enough - there are pros and cons, but in many situations that _can_ lead to balkanisation of the language

Raku has specifically chosen the "kitchen sink" option with a massive amount of cool stuff included ... I would argue that have both regex and Grammars tightly in the core language syntax is a big win in that case (and the default choice of Str as graphemes)

with Rust and Raku that's mitigated by crate and zef respectively - both reliable, unified package manager ecosystems