[Que]

I sincerely did not know about the tree-style tabbed browsing feature. I attribute this to my initial apprehension in adopting tabbed browsing to begin with, thanks for the info!

I also think this has a lot to do with browsing style as well. For purposes like my own I rarely need to have more than 5-10 pages actively open. I make extensive use of bookmarks and generally group my tabs in separate windows for organization purposes.