[VorpalWay]

Fair point, I don't tend to do much with heap in Rust (or any language) as I do hard realtime. You allocate all you will need up front.

As for data oriented design: yes, and it depends on your usage pattern. E.g. arrays of structs can still be better than struct of arrays if that matches your cache line access pattern. Zig probably makes SOA easier for the cases where that is more efficient (I haven't used Zig, but I have read a bit about it. It has some cool ideas (comptime), but also things I can't get behind such as lack of RAII, and generally lack of memory safety.)