Except the only thing that makes OOP OOP: Message passing.

Granted, Swift only just barely supports it, and only for the sake of interop with Objective-C. Still, Swift has better OO support because of it. Rust doesn't even try.

Not that OOP is much of a goal. There is likely good reason why Smalltalk, Objective-C, and Ruby are really the only OOP languages in existence (some esoteric language nobody has ever heard of notwithstanding).

So the approach of having a new language that requires a full rewrite (even with an LLM) is still a bad approach.

Fil-C likely can do the job without a massive rewrite and achieving safety for C and C++.

Job done.

EDIT: The authors of Ladybird have already dismissed using Rust, and with Servo progressing at a slow pace it clearly shows that Ladybird authors do not want something like that to happen to the project.