I had C++, python and ruby in mind, but yes, GP also mentioned Rust in the list of 'sprawling' languages, and they are probably right about that: Rust started as a 'better C replacement' but now it is trying to dominate every space for every programming language (and - in my opinion - not being very successful because niche languages exist for a reason, it is much easier to specialize than to generalize).

I wasn't particularly commenting on Rust's backward compatibility story so if you're not sure what I was arguing about then why did you feel the need to defend Rust from accusations that weren't made in the first place?