It might unironically make the game run better than it is running now with Unity. If you've ever ran your own Rust (the game) server, you might've noticed just how wonky the whole framework is. Just switching to/rewriting in Unreal might de-bloat the game, who knows?

There are, btw, project conversion tools like the Utu Plugin (Unity to Unreal Project Converter; see i.e. https://youtu.be/34qx5Ac8cZo) and some other frameworks on GitHub that might at least help in some rudimentary conversions in a switch from Unity to Unreal. That is, if going full Rust is a bit of a stretch and taking the joke too far.

One door closes, another one opens.

My friends and I joke about wanting this all the time.

I also keep making jokes about running a Rust server on an Oxide rack... only a matter of time, I think, hahah.