Someone's said it before, but I'll say it as well. It can smash anything in creation. Aka, there is no known substance that won't shatter from its slash, whether it be diamond, long grass sword, or Hashirama's wood style, and considering it's never failed to do so yet, it actually wasn't hyperbole. The only thing that's hit a PS sword head on and had not been cut through was Naruto's Kurama avatar tail with 6 paths senjutsu. Even Hashirama's true several thousand hands statue enhanced by senjutsu was getting cut up before the TBBs exploded.