I built a computer with its own languages, and I consider it to be _less_ cognitive load when everything is in 1/2/3 languages. I don't have to worry that the n

I built a computer with its own languages, and I consider it to be _less_ cognitive load when everything is in 1/2/3 languages. I don't have to worry that the next program I want to read the sources will require "Go, Rust, C++, JS/TS, Python, Java, etc." There are other metrics to consider besides your notions of cognitive load and productivity. Inferno predates most of the languages on your list. My computer (https://github.com/akkartik/mu https://github.com/akkartik/mu) uses custom languages because I was able to design them to minimize total LoC, and to ensure the dependency graph has no cycles (unlike all of the conventional software stack, at least until https://www.gnu.org/software/mes https://www.gnu.org/software/mes connects up all the dots).