I have worked in the publishing industry, translation and editing (got out to a more dependable career just in time), and what is astonishing is how even "load-bearing" text is not safe from the cost-cutting pressures. That is, even some respectable publishers for the last several years will publish a book one is expected to pay good money for, with minimal editing and proofreading compared to the old days, and if it is an originally foreign book, with machine translation and minimal post-editing.