I think maybe they were confused by this text (which I agree has nothing to do with Rust itself breaking):

> 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.

Ah, yes, that makes sense. I can see how this could have been misread.

aye - it ultimately was my misreading of the commit history. Agree that this wasn't a rust specific change.