I think correlating "pushes per repository" to certain languages is interesting. The top "pushes per repository" are C++, TeX, Rust, C, and CSS. I guess it's no surprise many would also consider those the most guess-and-check or hard-to-get-right-upfront-without-tooling languages too.

It's unclear if that's the takeaway here. Pushes per repository can just as well indicate a project that's just old, or active, or popular, or etc.

Really? I don't think Rust is like that because it has such strong compile time checking. More likely because Rust 1.0 hadn't even been released in 2014 so by definition every Rust project was extremely new and active.