Depends how many hash tables you have! :) I agree that it's a marginal gain here, but Thomas asked for a case where predictability of "more difficult than a L

Depends how many hash tables you have! :) I agree that it's a marginal gain here, but Thomas asked for a case where predictability of "more difficult than a LCG or Mersenne Twister, but not infeasible under crypto assumptions" would have value. This would be an example.