It's not impossible. But I do think mechanic is very sure about how f2pool antpool and a few others will act in a very narrow window of time which just doesn't seem to be very grounded in facts. In math? Perhaps. But these are humans. Simply taking their eyes off the ball for half an hour would be sufficient to put 110 behind by a few blocks, effectively burying it. Could one or two get cute and reorg from there? Yes, it's possible. Better make it quick though especially if you want that market value to cover the electricity bills amid the chaos. It's weird that @Bitcoin Mechanic 's whole gameplan is to rely on mining centralization to get this across the finish line. It might work, and I'm not taking price exposure either way, but I'd be surprised if it does. Guess worst case scenario we activate a bad minority fork and hilight just how dangerous centralized mining is. Another 'everything is good for Bitcoin' scenario.