A friend who works in academia published a book with a major university press. The press had someone (in another country) do copy edits, and it came back with all of the historical language "corrected" to modern English. It's as if they ran it through a standard spell checker and just picked the closest replacement for every single word that came up. Since there was no redline provided, it took my friend hours to go back and fix all of their errors (there were other formatting changes that had to stay, otherwise they could have just reverted to the prior version).