Nintendo is the only console maker of the big three without an integrated achievement system for its consoles. Achievements are immensely popular, and many people want them on the Switch, but I think a lack of achievements is an overlooked unique selling point for Nintendo.
Achievements are a "meta" aspect of video games. They aren't actually part of the game itself, but more like commentary on what you did. Commentary that you can show your friends—if you're into that sort of thing. Some people love it when a little achievement pops up during a game to let them know they've completed the requirements for some or other task, but for me, they're an annoying distraction.
Now, the first thing everyone says to this is "you can just disable the notifications", but the way that Xbox and PlayStation achievements are designed means they are always in sight at some point. They clutter up the screen when you're browsing your games, litter your profile page, and try to get your eyes on them wherever possible. If Nintendo implemented a truly optional achievement system, I'd be less fussed about it, but their competition only offers half-measures, and that's not good enough for me. My Switch is currently the only place where I can play video games and only have to think about the game itself.
Achievements may not directly be part of a game, but they can have a negative impact on the gaming experience in a number of ways. If you're the sort of person who's a little compulsive about completing lists, for example, then you may end up grinding away at achievements long after the game has stopped being fun.
Likewise, game developers who design their games with achievements in mind have a perverse incentive to use achievements to drive engagement, or stuff the game with filler to push up play time numbers, or even maximize the chances that players will use microtransactions. Since achievements
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