By far the best feature (IMO) is that it has no trouble talking to the most important Windows COM libraries (like DirectX) and the Objective-C runtime (for Metal), and this comes as "batteries included", not some random third party library you have to download.

So for any sort of visual engine development (game engines being the most obvious, but also applications like blender or the JangaFx suite which is the main user of Odin), it is great. What you need is just there ready to go.

The language design itself is very much oriented around appealing to people who do this sort of work.

Other than there isn't much to the language really. It lacks a "big idea" feature like Rust's lifetimes or Zig's comptime. The closest thing to a "big idea" is the rejection of package managers but that's not really part of the language.

It's pleasant to use and compiles fast. Hard to complain.