I'm not sure what this is arguing against here. Anyone who follows Rust knows that it's relatively modest when it comes to adding new features; most of the "features" that get added to Rust are either new stdlib APIs or just streamlining existing features so that they're less restrictive/easier to use. And Rust has a fantastic backwards compatibility story.

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?

Tbh I think `rust-toolchain` solves most of these issues