> It is rather ironic half of their sites are going to break, unless they conveniently add an exception.
Those sites aren't going to break, even without adding any exceptions. There's no definition of "essential" that would exclude Flash content on Google Finance. As mentioned above, the exact heuristics they're using are:
"TLDR, essential content is either:
1) On the same domain as the page
2) Considered "Large" (at least 298 x 398, certain aspect ratio, minimum total area), with an exception for tiny content (likely transport plugins)."
And one would be wrong (at least in one's implication). There's enough sites on the Web still using Flash to deliver part of the core site that you don't need fevered conspiracy theories to explain why actual core site content wouldn't be clocked.