Threads are paginated for performance reasons (yes we're working on it), so to see the rest of the comments you need to click More at the bottom of the page, or like this:

https://news.ycombinator.com/item?id=26304051&p=2

https://news.ycombinator.com/item?id=26304051&p=3

(If you've already seen a bunch of these, I apologize for the annoying repetition.)