> With the release of Apache Arrow 3.0.0 there are many breaking changes in the Rust implementation and as a result it has been necessary to comment out much of the code in this repository and gradually get each Rust module working again with the 3.0.0 release.

This appears to be an issue with Arrows implementation hitting a new major version and the Rust libraries not yet being compatible with the newest versions of Arrow. That's not something specific to the Rust ecosystem. It's not like a new version of Rust broke this project.

But even if it had, maintenance is always hard and the health of a project is better measured by how long it takes to be working with new, major, stable versions after widespread community adoption of those new, major, stable versions.

I don't know if Arrow 3.0 is the most commonly used implementation-- it may not have even reached that milestone.