So why didn't you say that at the time this was being proposed? Now we have yet another part of the standards that people can't actually use because one browser

So why didn't you say that at the time this was being proposed? Now we have yet another part of the standards that people can't actually use because one browser vendor didn't like it for a vague reasons. It undermines the process to go around cheering for HTML5 and then later decide that you don't like it after all.