Last modified: 2010-05-15 15:41:07 UTC
One notices that Special:Allpages spits out hundreds of page names (on
a small wiki, so one dares not click it on a large wiki.) (unlike
Special:Categories, which gives 50 items by default).
Special:Allpages also doesn't accept a limit= parameter.
It's a fixed default size.
Past a certain number of pages, it's also grouped down into manageable chunks