Pretty much this.
Right now, Chrome cannot handle a proper adblock or noscript because the functionality does not exist. The best they can do is suppress the ad, but it will still load. However, Google is attempting to amend it.
It wasn't just the fact that OGG was not up to snuff. No one knows how many fights OGG would have to go through if it suddenly had something like Youtube and other sites utilizing HTML5 behind it. Depending on how many patents it crossed, it could have been bloody.
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