So what's the problem with what people do? The article doesn't go into detail. Keeping things 100% DRY is never a bad thing, with the only exception that code b

So what's the problem with what people do? The article doesn't go into detail. Keeping things 100% DRY is never a bad thing, with the only exception that code becomes too obscure and hard for new contributors to start on, which granted it's pretty important, however it's not like people are getting DRY wrong.