Can you use Cocci for Java today without hassle?

I wonder how coccinelle compares with something based on clang transformer (something like https://research.google/pubs/large-scale-automated-refactori...)

Unrelated, but collabora's work with GStreamer... it reads very well. People are using this when they need an upgrade of their prototype in Roboflow?

Ooooohhh coccinelle for Rust?

Extremely exciting! As someone who values understanding my code, I'd use it over LLM-based refactoring any day of the week (although I might use a LLM to produce coccinelle patches).