There is a valid point here, which is that it's sometimes difficult to know what "the right thing to do" is in Rust, because it is a large language. I agree and can sympathize. I happen to like Zig also, FWIW.

But it does need to be said, that the approach he was using with Rust was absolutely not the right tool for the job. The author should have been using traits. That's what they're for, and they definitely aren't an obscure language feature.