If being nice precludes offering a legitimate criticism, then I'm happy to be mean. I didn't use an ad-hominem, or attack some trivial mistake in their implementation. I am opening a conversation on, what I see as, a growing trend to emulate physical books on the web and impose a layout limitation where (I think) it doesn't make sense.
I know this is the kind of thing it's easy to lead with on the internet without thinking, but for present purposes it does not count as nice. Please be nice in these threads: https://news.ycombinator.com/item?id=11440627.