The problem with that exponential slowdown is that a million-year runtime is so impractical it should be considered impossible. And if that isn't convincing, d

The problem with that exponential slowdown is that a million-year runtime is so impractical it should be considered impossible. And if that isn't convincing, double the problem size and square the runtime for a trillion years. The sun will engulf the Earth long before the progress bar reads 1%.