Oh come on now, do you and the parent really have to be those guys who go "well technically they're not zero cost because the programmer has to wait"? Yes, you

Oh come on now, do you and the parent really have to be those guys who go "well technically they're not zero cost because the programmer has to wait"? Yes, you're technically correct, but also being unreasonable. It was pretty clear that "zero cost abstractions" refers to the runtime aspect. That is the default meaning, there's nothing to "get back to".