amusing read, but I do think you've been overly critical of IE in more recent years, IE was a turd to start with we will all agree, and it became a polished turd up to IE6 at which point your correct that anyone with any sense dropped it like a rock bar those that were forced in to using it
but since IE8 you have to agree its got notably better, I dropped Firefox in favour for IE8/9 because like the others it became bloated and generally speaking utterly shite. IE10/11 however has been a gem to use, I ditched Chrome and all the crap that comes with it in favour of a very sleek and pretty damn quick IE and ive not looked back since, I occasionally dip my toes in the chrome water but never really warmed back to it.
The metro IE was a bit of a misadventure but if we keep the focus on proper IE11, its hard to fault it any more than any of the other browsers out there.
I'm interested in Spartan purely to see how its going to get better, ditching a lot of the legacy crap will help greatly but will it make day to day usage "better" time will tell.