Replayability is innate to the game, I won't replay Bayonetta because there's an achievement for killing boss x on hard without taking damage, I'll replay it because it's fun to get better at it when I'm confident it's my skill that needs to improve and not the game being cheap. If it unlocks something cool after beating that challenge that's neat but I'd try it anyway. You don't need achievements to have the carrot on a stick either, games always had rewards for tasks the developers found worthwhile or fun, finish RE in this manner and you get a rocket launcher, finish MGS in that manner and you get the infinite ammo bandana, finish Silent Hill like that and you get a different ending. Much of the time they even had faith in their game being on its own good enough to replay it that the rewards weren't shown before getting them unlike achievements. Making the reward an achievement adds nothing for me while the opposite of adding an achievement on top of an existing in-game system of whatever rewards seems inconsequential. BOTW has you find 1000 koroks, having an achievement for finding them doesn't make me more or less likely to find them, the rest of the game design and how they're integrated is what will make me interested or not interested enough. I didn't agree it's cancer, I just fail to see why they're important in any way whatsoever, any argument for it ignores examples of how to achieve the same thing without having them, as if there have been no replayable games with plenty incentive, from fun to unlocks, on platforms without achievements to present them as the #1 cause for replayability or anything else.
