Ironically, poor readability damages practical maintainability; you can't maintain what you can't read. Meanwhile, less-maintainable code doesn't tend to be readable. So, while they're at odds with one another in one sense, they're paradoxically related in another sense.
There is a way to deal with poor readability. It is known as Commenting Showing Intent (CSI): standards.mousepawmedia.com/csi.html
Of course, it doens't preclude good coding practice.
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