https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

The pagination was there mostly for performance reasons and I think with sufficient performance improvements it ended up getting turned off (if you scroll through these comments you can see various times when it's been turned off or on and various suggestions it will eventually get turned off permanently.)

AFAIK the paging was something that moderators cast by hand, when some intensive trafic is flooding.

I really really appreciate that somewhere on the Internets there is a page able to contain 1k+ comments. Of course it is possible because of super light webpages, because the server can do it anyway, but if the page with all JS animations or round corners becomes too heavy for client device the webmaster is going to hide most of the comments behing spoilers/pagination. It is way more handy to hide not interesting threads instead of constantly unhide hoping there is anything interesting.