A couple of years ago when checking out Rust for scientific work I started looking for familiar ground, e.g. Jupyter notebook support. I was happy to find google/evcxr's Jupyter kernel [1] and started writing an early access book on Rust for data analysis [2].
I still check _Are we learning yet_ [3] to see their recommendation on the state of the ML stack (including data processing and structures) in Rust. It still lists "the ecosystem isn't very complete yet.", which is how I felt at the time!