Comment by dragonwriter

Ruby is a web-focused scripting language in the same sense that Python is an AI-focused scripting language.

JavaScript is much more of a "web-focused scripting language" than Ruby is, and it is quite happy with immutable strings (only).

> I think the comment is about that you now need to choose mutable vs immutable, and that is framed as a consequence of broader adoption.

Ruby has also had immutable (frozen) strings for a very long time, so you've always had the choice. What is changing is that string literals are (eventually) going to migrate from "mutable with a strong-encouraged file level switch to make them immutable" to "immutable".