Great option. I was waiting for such an option. Another problem I have is that I keep scanning the front page list of references to see if a new article popped

Great option. I was waiting for such an option. Another problem I have is that I keep scanning the front page list of references to see if a new article popped in somewhere in the list between the last time I checked. This is inefficient. My impression is that providing a list of references sorted by the time they reached the threshold would do the trick. Though, this would require a significant amount of work to produce. Being able to precompute the sorted list and share it with many users would allow to cache it. So I raise the question if it is not preferable to propose predefined threshold values. How much difference would it make to have a threshold at 55 and 54 anyway. Let say you propose a treshold at 10, 25, 50, 75 and 100 for example, the pages could be precomputed and cached. A script on the browser side could keep track of the last references seen and show older articles in gray for instance.