Legitimate question: is there anything Elixir / BEAM is particularly bad at?

I've seen it start cropping up in some Fintech circles so I'm wondering if this language has some serious juice for concurrent data analysis or something.

It is historically not great at number computing. This is being addressed by a relatively new project called Nx. https://github.com/elixir-nx/nx

It is not the right choice for CPU intensive tasks like graphics, HFT, etc. Some companies have used Rust to write native extensions for those kinds of problems. https://discord.com/blog/using-rust-to-scale-elixir-for-11-m...