Why webkit sucks

As opposed to what alternatives (besides native)? The author doesn't mention working with Gecko (which I hear is much more complicated to use as a library), Presto or anything besides Webkit; seems a little unfair.

I don't see what the big push towards writing everything in HTML/CSS is all about. Native apps give the user a much better experience, and isn't that what we should all be worrying about? Writing complex webapps is much more difficult than writing complex native apps in terms of performance, because sometimes a single thread just isn't enough.