It's not particularly easy to use for people without screen readers either. A pane on the left shows a DAG, with nodes representing Hacker News comments extending from a central node. Mousing over a node shows the comment in a pane on the right. It's impossible to move the mouse pointer from the left pane to the right without changing the visible comment.
>It's not particularly easy to use for people without screen readers either.
That's very true. This hasn't really been designed around screen readers, making this type of graph + comment tree interface work accessibly well is a really interesting challenge!
>It's impossible to move the mouse pointer from the left pane to the right without changing the visible comment.
If you click anywhere on the graph then it locks the current comment selection. You can then click to unlock!