There are two issues here. The author doesn't really seem to care about distinguishing them, so I will: 1) Shitty rendering engines used in (some) ebook reader

There are two issues here. The author doesn't really seem to care about distinguishing them, so I will: 1) Shitty rendering engines used in (some) ebook readers. If the ebook original has an em dash and it's being converted and displayed as hyphens, that's just bad rendering. Same thing if it has two hyphens together in a prose text context surrounded by spaces, and it's not being shown as an em dash, bad. 2) ebooks that start out bad. In this case, it's garbage in, garbage out. For this, the blame goes to the publishers, as he correctly noted. Has anyone done side by side comparisons of the same books, from the same publishers (I'm not talking about Gutenberg books that may have been converted using differing technologies, but major publishers), on different ebook readers from different companies?