Is it even that compelling if it's open source? I'd rather it just be based on WebKit and contribute back to that project.
I'm not sure a webkit monoculture is good for the web in the long run. Having multiple browser engines compete is a really positive thing, as long as they are all going for standards compliance. Thankfully, even Microsoft have made huge moves in the right direction on that front.
Renderers are one place where I wouldn't mind a monoculture. I'm guessing billions?! of dollars of wasted man hours have been spent on making websites look the same across browsers.
Why? Trident is a good rendering engine, I'm glad it exists. But if it were open-source that would be even better.
"what the fuck is IE doing that for ... ohhhhh, that's what's going on here"
Not sure I understand the point of your link. Chrome has more than twice the number of vulnerabilities in a smaller timespan, while IE has more exploits than Chrome.