built my startup in elixir and can concur. elixir has a relatively consistent syntax that makes for a pretty good target for llms.

In my opinion, the only thing holding elixir back as an llm deliverable is that there's not as much training data for llms to work with.

Of course if we had a new AI that could be trained on a minimum of existing training data, common lisp would absolutely beat out everything else. everything you mentioned about elixir (repl, runtime, and ability to hot reload / directly test functions) are possible and were invented in lisp with an AST instead of a syntactic language as the ultimate build artifact. CL lets you recover from exceptions and rewind the stack before reloading your fixes and continuing. I can't even fathom the workloads an LLM could conceive of working with that.