Honestly using serde for language interop is one of my favorite things about serde, whether it's "classical de/serialization" or not. I've recently had the very

Honestly using serde for language interop is one of my favorite things about serde, whether it's "classical de/serialization" or not. I've recently had the very-pleasant experience of writing some code that needs to pass geospatial data back and forth between Python and Rust, and found that the geojson crate, even though it's nominally for JSON, actually works with other serde-compatible things, including (something I found kind of miraculous) Python objects, using the pythonize crate, which can walk them with serde visitors. So as long as I can get my data into a roughly-geojson-shaped thing on the python side, I can consume it on the Rust side, without having to ever actually produce json.