Wrong. Economic majority decides which fork will live and which fork will die. Miners have no say. If they are unhappy, they may attempt to attack fork abiding

Wrong. Economic majority decides which fork will live and which fork will die. Miners have no say. If they are unhappy, they may attempt to attack fork abiding to new rules. Whey have three venues of attack. 1. Producing blocks that abide to old rules will do nothing - client software will just reject them as incorrect. Fork choice rule (e.g. longest chain or most work done) applies when choosing between two valid blocks, not between valid block and invalid block. 2. Attempts to do a famous 51% attack is crazy expensive and have low impact. Why low impact? Because small events that are similar to rewriting history 51% attack does happen all the time. They are called block reorgs and all the software which uses blockchain as a data store have to handle it properly. Also, such attack will be perceived by users as attack on them, solidifying community around opposition to miners. 3. Targeting difficulty adjustment algorithm by mining on a fork and leaving it at the beginning of adjustment period. Lets imagine 80% of miners leaving. For Bitcoin it would create a situation when adjustment period would last 8 weeks instead of 2. Blocks would be produced every 40 minutes at average instead of 10. Ethereum is immune to this type of attack since difficulty adjustment is done every block, not every 2016 blocks.