That's kind of a cop-out, don't you think? After all, when we embark on from-scratch coding projects, we must not be perfect experts in the domain or we'd alrea

That's kind of a cop-out, don't you think? After all, when we embark on from-scratch coding projects, we must not be perfect experts in the domain or we'd already have code we can use, right? How are we supposed to become domain experts without writing the code? Attend night classes? :) The design the author winds up with has plenty of technical debt, but it's not hard to imagine winding up there, even with partial knowledge of the domain that is constantly increasing.