1 minute skim of that surfaces aviaviavi's comment on moving to Python not Rust:

  Main factors were (roughly in order):
  - None of us are experts in Rust, and we're all solid at Python.
  - Rust felt like an under-correction for what we wanted (get all friction in front of the LLM out of the way).
  - Our high-performance stuff is not being migrated at this time (Scarf Gateway), so we're just talking about basic CRUD backends here. Basically any language will work