Unless you mean to refute the idea that JS doesn't break anything ever - which it clearly does, occasionally, but proof-of-concept golf code that intentionally takes fragile shortcuts isn't the best example.
...But JS has moved away from monkey patching builtin objects for good reason, whereas Rust tends to be relatively promiscuous in adding methods to other people's types via trait impls. This isn't bad per se, but I do think it creates bigger compatibility risks.
https://www.fxsitecompat.com/en-US/docs/2015/string-prototyp...
Unless you mean to refute the idea that JS doesn't break anything ever - which it clearly does, occasionally, but proof-of-concept golf code that intentionally takes fragile shortcuts isn't the best example.
...But JS has moved away from monkey patching builtin objects for good reason, whereas Rust tends to be relatively promiscuous in adding methods to other people's types via trait impls. This isn't bad per se, but I do think it creates bigger compatibility risks.