MissInterpreted
I use my Ninja a lot - but mine is one of the multi-purpose ones, so it does more than just air fry, and I bought it for exactly that reason. It has other functions such as pressure cook, bake, dehydrate and so on. I find it a very useful piece of kit to have in the kitchen.
Mine is the 14 in one, and does all the things too, but I would have been better getting just a fryer, as I already have a pressure cooker, slow cooker etc, and really don't need to duplicate the functions. When it dies, I won't replace it like for like, but it does get used a lot. It's just the size and weight that is a problem, but keeping it in a drawer is working for now.