You do a good job on explaining the what of the language, but I cannot quickly find the why of the language. What is the language's purpose? Why should or could I use it?

This has been a pretty frequent source of feedback, and while I had ideas on that in my head, clearly I did not communicate them well enough

I updated the website & README with more of a rationale/viewpoint of why Aria exists. Please take another look: https://github.com/egranata/aria/blob/master/README.md

Agreed. Feels like "a scripting language for C developers who hate JavaScript"

That can be a decent "why" though...

I kinda like that :-) Maybe instead of "hate JavaScript", a scripting language for systems people?