Pagination works fine tho, for their demo page at least. An example long thread, [1] has a clickable link to [1]?page=2 at the bottom of the page.
But you can't post. If you log in (using javascript) it refuses to show you anything without javascript later, and you can't post a new message.
It's clearly not their priority, and I am not sure why.
[1] https://try.discourse.org/t/is-the-second-amendment-still-re...