The counterpoint is that whatever std invents is probably not going to be as good as what moviated people in the community make.

The rand crate is my favorite example of this. They have a whole bunch of different rngs. All rated by quality and performance. Some are csrngs and some aren’t. It’s a delight. “Batteries included” languages don’t come close.

Then there’s serde - which uses a clever technique with traits to allow compile time specialisation and optimisation of binary and json serialisers. Most people had no idea that was even possible in rust until someone in the community made it.

Maybe std should pick up the best crates from the community and bring them in house? This might be a good idea. But also maybe not. Since serde came out, several other crates have found ways to crush its performance numbers. Often by 2-5x if memory serves. What a relief we didn’t immortalise the slow version of serde, right?

I’m playing devils advocate here. I think std should be a bit bigger too. But there are real tradeoffs in doing so.