That makes sense. I guess I assumed the interop story would necessarily be arduous and crufty, but if both languages are native I can see how you might get more of it "for free".

Odin requires writing bindings (for the moment, this will likely be automated with third-party tooling), Zig actually has full first-class C importation.

In both cases the interoperability is excellent imo.

I can't speak to Zig as much, but Odin's type system makes working with C APIs much more of a pleasure than doing so in C itself.