They're all there! But HN paginates them, meaning you have to click the "More" links at the bottom to see them all, or like this:

https://news.ycombinator.com/item?id=38517550&p=2

https://news.ycombinator.com/item?id=38517550&p=3 ... and so on

(There weren't a thousand though, rather around 500—unless there's some sort of catastrophic bug I'm unaware of.)