>>718908325
i'll put it this way, it took me about a month to comfortably clear all 6s. Fast forward a few years later and there are still some 10s I cannot clear no matter what.
Yeah the difficulty curve in iidx utterly fucked at the higher levels, it just gets a point where the density gets so overwhelming that it forces you to really understand exactly what you are doing, where your eyes are looking at, how your hands are positioned, how you are "reading" note patterns. Any the bad habits that you accumulated have to be violently undone with great prejudice.

That or you just end up hitting a genetic wall