What a great thread!
Steam cleaner and Kindle are both unused by me. I occasionally remember the Kindle and use it, but I won't buy another. I bought second hand on ebay (there are resellers who will load it with a load of books) and mine is quite an old model, and I've just never found it intuitive to use. I do wonder if I'd get on better with a more modern one. I read magazines and downloaded ebooks (not kindle ones) on my tablet, and to be honest I should probably just remember and use the kindle app on that, more. The steam cleaner, i don't know if it's just a shit one but, well, it's just a bit shit, and as somebody else said, you have to clean up after using it anyway.
I wasn't sure about buying a nutribullet or an airfryer, but i wouldn't be without either of them now. I use both a lot.
Soup maker - I can take or leave, I bought one with the mechanism in the bottom of the jug; it wasn't very easy to clean and it got burnt on stuff that I couldn't remove very early on. It still got a lot of use until it didn't, because using a pan and stick blender ended up just easier, and you can make bigger batches! I replaced the spot in my kitchen where the old soupmaker was with the airfryer, and no regrets there. I did end up buying a new soupmaker, one where the mechanism is suspended from the top not the bottom, to take to my office so I would be more tempted to eat healthy soups as work lunches. It's not bad at that job! It's a lot easier to clean than the last one, and I do love that I can set and forget, as this one will cook, stir and blend all by itself and 25 minutes later, you have soup! It doesn't saute, but to be honest just skipping that step is fine, I'm not aiming for michelin quality!
I will also wax lyrical in praise of my cordless light weight vacuum cleaner (Miele) that can handle pet hair, and hand held dustbuster type vacuum cleaner (can't recall which brand that one is but it's not a fancy one) for little or hard to reach areas. Would buy both again.
Things I would like but am not sure about: a daylight alarm clock, and an SAD lamp. And a robot lawnmower (I can't use a normal lawnmower. I have a gardener, so the robot would replace a few but not all of the gardener's visits.)