Tree tabs are godly for this because it lets you retrace your steps. Say you start on HN and open five articles. You've now got HN/Site1, HN/Site2, and so on.

Tree tabs are godly for this because it lets you retrace your steps. Say you start on HN and open five articles. You've now got HN/Site1, HN/Site2, and so on. Then you find an interesting link on 3 of those 5 sites. With normal tabbing, you now have 9 tabs open and a majority of the text hidden on one line, where with a proper tree view, you can see the entire site, and how you got there, which is probably more valuable to me than the actual content.