If I have to make a choice to accept the airdrop and convert I think I am at the 85% point that I would.
It won't be necessary, as it will be airdropped on stake as it is now (or at time of snapshot) . The Steem will still exist on Steem, but I imagine that it is going to get rekt in price as people dump.
Yeah, I've seen a lot of people powering down, who knows if the new chain does start, I still have my almost 3000 SP powered up. I can't believe that I have that much already, I am almost back to a two cent vote at 100% power, maybe on the new chain I will be able to give a valuable vote more often. I don't really know how the change works, but I do know I will not be powering down, so if the airdrop is based on powered up steem, i have a bit now.