Nah, it's a pretty important post. It's the first guy to publicly say "the emperor is naked". The total object level information hasn't changed much, but now I know others know, and they know others know too. It's out.

And from now on everybody who has issues with the query optimizer won't shamefully look for documentation on how to fix _their_ use case, but publicly stink mysql for having a shit optimizer (which it has, btw).

Which in turn will support those developers inside mysql who want to push things forward. They won't seem like cowboys that want to fix a good thing - they'll have lots of user complaints to help them argue, and also the awareness that maybe, just maybe, mysql will get left behind if they don't move faster.