Going to sleep now, but whoever suggested for exchanges to start powering down now is 100% spot on. Even if coding was started now, followed by testing, it will take time. Meanwhile the exchanges could get liquid Steem back little by little, not waiting for God knows how long before the hardfork is ready. And once it is, they can get their remaining powered up stake out faster. I don't see what's the issue here is of not starting a power down now.