Obelisk strikes back
We prepared for something like this by adding an extra feature to the SC1. We can do a soft-fork that slightly changes the PoW algorithm which would invalidate the bitmain ASICs, but allow the SC1 units to continue working.And yet the SIA devs don't see the irony in criticizing Bitmain (Bitmain's pool actually) for mining empty blocks and being a threat to the community, while they are implementing some sort of kill switch in their ASIC. Its almost like they knew this scenario would happen. What a bunch of scum bags.