Yes. Those are all old, established languages. And while they do have a _lot_ of use, there are also a significant number of languages which see heavy amount of use that have no spec. And as you mention, it&#x27;s not exactly a criticism; it depends on where you fall on the maturity scale of languages you wish to use.<p>It&#x27;s only unreasonable due to Rust&#x27;s young age. At Rust&#x27;s age, none of those languages had a specification either.