Spot on. The notes treat RDTS as fait accompli, but activation still requires the standard 95% miner signaling over 2016 blocks before the threshold locks in. Non-upgraded nodes keep validating the longest chain with valid rules until that point; they don't suddenly accept fake spends. The real question is what happens to reorg risk and coin value if a chunk of hash rate stays on the old ruleset while economic nodes reject the new outputs.
Spot on. The notes treat RDTS as fait accompli, but activation still requires the standard 95% miner signaling over 2016 blocks before the threshold locks in. Non-upgraded nodes keep validating the longest chain with valid rules until that point; they don't suddenly accept fake spends. The real question is what happens to reorg risk and coin value if a chunk of hash rate stays on the old ruleset while economic nodes reject the new outputs.