I think this is exactly the point though (maybe more of the link than of this comment) - a sufficiently good product by all external quality metrics is fine even if the code is written on one line in a giant file or some other monstrosity. As long as one black box behaves the same way as another in all dimensions, they are competitive. You can argue that internal details often point to an external deficiency, but if they don’t, then there is no competitive pressure.