Coming from a Python background, working with data heavy analytics in finance, one of my biggest Rust-is-the-one moment has been because of Polars. It lets me do everything I could do with Pandas, but with added speed and safety. Lack of such packages (as far as I'm aware) in Java, C++ and other languages keeps an entire ecosystem of data-heavy workloads in Python. But most Python projects I've found are very hard to scale beyond the prototyping phases.

Are you familiar with Kotlin's DataFrame? (https://github.com/Kotlin/dataframe)

JetBrains also keeps a list of other data analysis libraries for Kotlin (and Java) as well: https://kotlinlang.org/docs/data-analysis-libraries.html