This was exactly about a tedious love and hate of Katanas, you know how I can tell?
I can tell because nobody brought up that a katana cleaving right through plate is no more ridiculous than a longsword cleaving right through plate, or a pallasch, or a yataghan, or a schiavona, or a saber, or a gladius.
By the rules, all of these weapons can get enough successes to cut through plate. It isn't even unlikely, I have no doubt that you have witnessed this happen. The problem is universal, it isn't about the Katana, it's about how damage stacks in Riddle of Steel.
But that wasn't what was brought up. No, it was the Katana, because that's what people like to fight over. It's hotbutton bullshit, and if the person responsible didn't know, then he fucking should have!
I am angry because I had to physically COME IN HERE and TELL YOU that this was an argument that totally missed the point, and that both the proposer, and the person arguing against it, were wasting their time, and worse, being counterproductive.