> Zero cost only means that you don't pay extra (CPU/memory) at runtime, whereas in interpreted/GC languages you do.
But... again, you do. The examples in the linked articles have runtime overhead. Likewise every time you wrap something in with Box or vec or Arc to massage the lifetime analysis, you're incurring heap overhead that is actually going to be worse than what a GC would see (because GC's don't need the extra layer of indirection or to deal with reference counts).
It's fine to explain this as acceptable or good design or better than the alternatives. It's not fine to call it "Zero Cost" and then engage in apologia and semantic arguments when challenged.
But... again, you do. The examples in the linked articles have runtime overhead. Likewise every time you wrap something in with Box or vec or Arc to massage the lifetime analysis, you're incurring heap overhead that is actually going to be worse than what a GC would see (because GC's don't need the extra layer of indirection or to deal with reference counts).
It's fine to explain this as acceptable or good design or better than the alternatives. It's not fine to call it "Zero Cost" and then engage in apologia and semantic arguments when challenged.