Token efficiency is only one metric. Simplicity of syntax and semantics are another valuable one.

re: tokens and session length, there are other ways to manage this than language choice. Summarization is one, something I do is to not out read_file content in the messages, but rather in the system prompt. This means that when it tries to reread after edit, we don't have two copies of the file in context.

Going to 10M token sessions, keeping per turn context under 100k, working on Golang... language choice for the sake of tokens does not seem a good thing to decide based on