I don't think that's what he was referring to... It's the simple fact that explorer is what's included in windows, it's what was MEANT to be used as the shell. Its features are integral to the functionality of windows and frankly, most of us have gotten used to it and the way it works. Like NR, I see no real reason to use an alternate shell. For the most part, it offers all the features I need and expect from a shell. While BB4Win might be a novel idea, I don't see any compelling reasons to ditch explorer as my shell.