Not quite--plan to throw away the internals, not the interface. This lets you do things like writing shitty hyperlinear naive solutions to get all the pieces o

Not quite--plan to throw away the internals, not the interface. This lets you do things like writing shitty hyperlinear naive solutions to get all the pieces of a system in place, and then going back and optimizing each in turn. You don't spend a lot of time fussing over little details, and instead make rapid progress. If you don't spend time on the interfaces between the pieces, though, you're absolutely screwed.