You don't need operator overloading for vector and matrix math, see pretty much all GPU languages. What Zig is missing is a complete mapping of the Clang Extended Vector and Matrix extensions (instead of the quite limited `@Vector` type):

https://clang.llvm.org/docs/LanguageExtensions.html#vectors-...

https://clang.llvm.org/docs/LanguageExtensions.html#matrix-t...