Of course Witten says that String Theory and M-Theory are the big breakthroughs. He says that M originally stood for "membranes", because a colleague thought that it was a membrane theory, but Witten was skeptical so he abbreviated it to M. He coysishly pretended it stood for Magical or Matrix. If it turned out to be a membrane theory, he would claim credit.
He admits that string theory could never accommodate parity violation, so it was always inconsistent with the Standard Model.
He defends the Landscape and his inability to predict anything from his theories by saying that gravity theory does not predict the length of the Martian year. Also he says his critics do not suggest a competing theory.
Wow, he cannot admit that he is really a mathematician wannabe who happens to like studying the mathematical structures of theories with no physical significance.