They don’t hand write it because it would be an embarrassment. At the same time, Claude Code doesn’t really need to be any better than it is while Anthropic has great models no one else has.
That's why. That future is uncertain. So why gamble your future on something that's popular at the moment for something that could change completely a year later?
A language without a large stdlib pushes this that functionality into (transitive) dependencies. I hope more language will adopt batteries included approach.
No stdlib will ever include all the "batteries" you need. And large stdlibs have their own set of problems, like stagnation, tying the library version to the language version, backwards compatibility garantees preventing evolution, and either needing a wide range of domain experts to maintain it, or having developers maintain components they don't have a deep understanding of.
I think the sweet spot is having an ecosystem of "blessed" libraries that are reviewed for security and quality, but are versioned independently of the language, and maintained by subject matter experts.
This particular crate (arrayref) seems pretty niche, but also doable in std now.
It lets you take a slice `&[T]` and return a slice with a known number of elements`&[T; N]`. tiny-skia was probably using this to get some SIMD optimizations.
These companies have many billion dollar investments and yet their main product is a bloated meh.
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