I suspect because a lot of Rust library projects are just clones of a project (usually in C) translated to Rust. This is a good way to learn Rust. However, af

I suspect because a lot of Rust library projects are just clones of a project (usually in C) translated to Rust. This is a good way to learn Rust. However, after you learn it, why maintain it? There isn't really much incentive. Add to that the politics of the Rust ecosystem and it causes churn in the dev population. I suspect there are other reasons too. There is a cost to fad languages being used. Replicating the ecosystem of libraries around a language is a huge job. Its rare that a language ever gets the same size and quality ecosystem as say C or Java. But the fans of the language will try. This leads to a lot of ported projects and a small number of devs maintaining a huge number of projects. That's a recipe for abandonware. I suspect a lot of student projects too which is also likely to do the same.