I think even 2021 is late for such a critical feature. It should have been thought of and implemented even earlier. If Twitter can maintain an army of bluecheck

I think even 2021 is late for such a critical feature. It should have been thought of and implemented even earlier. If Twitter can maintain an army of bluecheck mark verifiers, reversing bad community notes could be handed over to them or similar group of people, especially when Twitter's aim was to be goto source of quality information.