- optimizing the code density (threaded interpretation)
- the dynamicism was said to allow for numerical optimization not possible in math libs / fortran long ago
(see J.V.Noble papers, I'm not knowledgeable enough to confirm his claims but i assume they hold some ground)
- the bare-metal repl feel is also special, as freeing as poking basic on old hardware but with the freedom of lisp in a way
forth sits in the thinking-altering languages land firmly imho
May I recommend the Concatenative discord server to dive deep into a vibrant, niche community of small forth-like languages. There’s a lot of cool people in there (I’m just a user)