I think the main argument in favor of something like Elixir is precisely that it’s more performant than Ruby, but if I were to lean into performance as an argument for something I’d probably pick up Rust or Go instead. I know that functional spergs will wig out at me for that but it’s true.
I really like Ruby “metaprogramming” too. Something about it is just so… muah, so sweet. But then again, that might just be my own acclimation to it speaking.