The temporary part isn't why a reorg is threatened. A reorg is threatened because if in August 110 has 30% hash power and then in December it surges to 60+% hash power, you're looking at a potential for 3+ months of transactions to be reorged out when the 110 chain potentially becomes the heaviest chain. What is known as a flippening. If you thought CSAM had the potential to kill Bitcoin, see what happens when the presumption of transaction immutability goes out the window.