I wouldn't mind if one result of this was a writeup on what patterns/antipatterns are there when converting code and concepts that used to be very aligned with C++-style OOP, deep inheritance and all that jazz, to what feels natural in Rust, and how you can rephrase those concepts without loss in the substance of what you need to do.

I guess it's a long way off, since the LLM translation would need to be refactored into natural Rust first. But the value of it would be in that it's a real world project, and not a hypothetical "well, you could probably just...".