Hey HN! I'm Lakshay. Raveen and I have built Cerulion, a ROS2-compatible robotics runtime written in Rust. We've worked hard on lowering IPC transport latencies without making the single process tradeoff or forcing POD message types. These fast multi-process graphs can then be resimmed deterministically, and existing ROS2 nodes/launch files can run unmodified alongside native Cerulion Rust/Python code.