If I'm not writing javascript, I'm writing rust because I want particular memory use and performance characteristics from the code I write. (Also because I want a fat binary I can deploy easily without needing any platform ceremony around it.)
If I'm not writing javascript, I'm writing bash because this is the glue language of system administration and operations at npm. npm's registry is 90% javascript, 5% bash, and 5% rust.
I made those numbers up just now. Do not quote me. They're all good language, Bront.