I think that's a false dichotomy in many cases. For example, compiler errors. Elm and Rust have really good errors, and that benefits everyone. Once that part i

I think that's a false dichotomy in many cases. For example, compiler errors. Elm and Rust have really good errors, and that benefits everyone. Once that part is done, I agree with you. I also think you may overestimate the depth of knowledge that the average programmer has about his most used programming language. Languages evolve a lot, sometimes faster than how you used them. People also don't use the same programming language during all their life.