I am skeptical about the more complex meta-strategies discussed in the interview. If you play a ZD strategy, but switch to a different ZD strategy if after 100 moves you’re not doing as well as you should be, then you’re not playing a ZD strategy: you’re playing some different strategy that has a 100-move memory. The extortion arguments only go through if you set a strategy at the beginning of time and never touch it again, in which case there is no place for bargaining.
I am skeptical about the more complex meta-strategies discussed in the interview. If you play a ZD strategy, but switch to a different ZD strategy if after 100 moves you’re not doing as well as you should be, then you’re not playing a ZD strategy: you’re playing some different strategy that has a 100-move memory. The extortion arguments only go through if you set a strategy at the beginning of time and never touch it again, in which case there is no place for bargaining.