[IshKebab]

That's a guide for how to learn the language once you've already decided that you want to learn it. There's nothing to convince me that I should bother.

Hello world and variable declaration syntax isn't going to make me go "ooo interesting! Tell me more!".

I skimmed the guide and found none of the promised "Grain is a new language that puts academic language features to work".

It seems to be a reasonably nice ML/Rust-alike presumably with GC and depending on the unstable WASM GC proposals, though that's mostly a guess - obviously they don't say that anywhere in the main page.