Because other people keep adding new posts (and upvoting existing posts, which changes their order).
While that's true I think that once the feed has been observed in a certain way the advantages of stability outweigh the advantages of showing a tweaked version the second time it is loaded.
alt Hacker News
While that's true I think that once the feed has been observed in a certain way the advantages of stability outweigh the advantages of showing a tweaked version the second time it is loaded.