Am I wrong in understanding that this rewrite is what produced Gecko, which is still one of the top browser engines a quarter of a century later? I really think Joel called this one wrong.
Off-topic: anyone else remember the Mozilla browser before Firefox? Remember XUL? That was with KDE and Gnome 1.x, when the Linux desktop was just round the corner. Who needs Word when you could use StarOffice....
I think Joel's advice is holding up pretty well.