[untog]

One example is doing deep comparison on objects. ES6 still has no equivalent for that, and it's something you can do in one line in other languages.

[patates]

Which languages? I'd think it's rare because I know no such standard function from the top of my head.

[untog]

Swift immediately comes to mind - structs are value types. Also, Kotlin has data classes.

[julien_c]

`util.deepStrictEqual` in Node at least