Everyone seems to think they have to reorg the whole chain. Why do people think that? Reorg like 10 blocks (repeatedly?), and already you have done much damage. Miners miss rewards etc
A short re-org attack, if worked on by enough hash to matter, would've already materialized.
So you know their battle plan then? What if they use a war of attrition approach atm until unprofitable mining is reduced more and then attack? Or maybe they still gather their forces?