I don't have a stand mixer - so no accessories! Do I need a stand mixer? Not as far as I know. Maybe someone can tell me why I might need one...
Like most things in life, it’s as much a want as a need, I suppose.
I use mine for doughs about half the time, when either or both of my wrists are acting up and it’s too painful to hand-knead, or if I’m really busy and need that 10 minutes or so of kneading to do something else.
I also used to use it to whip cream, until I got a stick blender; now I use that because I can do much smaller amounts. I can’t whip cream by hand, and have tried dozens, if not hundreds of times, with no luck. Same with egg whites.
I’ll use it for cake mixes, for creaming butter and sugar because I think it does a better job of incorporating some air in there versus doing the creaming by hand.
The last thing I always use it for - I make a cheese ball every Christmas and it’s great for that.
I should add that until a couple of months ago, I never owned an electric hand mixer, so anything you’d use a hand mixer for, I’d use my stand mixer for. When I started making smaller amounts of things, I finally broke down and got a hand mixer, because it’s hard to beat one egg white in a big stand mixer.