[m_nyongesa]

I don't understand what the Julia language offers over for example OCaml, which has a solid type system yet also has a REPL as well as a scientific computing library:

https://ocaml.xyz/

https://ocaml.xyz/docs/

[galangalalgol]

Performance (c-like is stretching it, but not by much) and existing libraries for everything I can imagine.

[dunefox]

Usable strings come to mind.