I guess I am just a pack rat as appliances I use a few times a year are bagged on special shelves in the garage for quick and easy access for a specific purpose. So I have a big old 1950s(?) rotisserie oven that turns a splendid chicken for me 3 or 4 times a year, 2 waffle irons (one is heart shaped and gets pulled out every Valentine's Day to make pink waffles), a dehydrator because every year or so I buy a big box of field ripened tomatoes and some get dried while others get turned into sauce in order to keep ahead of spoilage, a seal-a-meal to package boilable pads of sauce for future use, a monster juicer that is SO's 'thing' from time to time as he loves V8 but hates the amount of salt in it, an expresso pot with steamer that gets introduced to the kitchen about once a year for about a month until the 'craving' has worn off, a breadmaker (which is currently in the kitchen due to COVID), a deep fat fryer, a 6 qt crock pot for larger items as well as bigger portions to be packaged and frozen down.
Currently on my kitchen counter are a regular drip Mr Coffee type pot (daily use), burr mill coffee grinder (daily use), a stand mixer (weekly use), a toaster (2-3 times per week at least), food processor (once or twice a week), blender (probably should move to garage as it is getting to be more like once a month), 4 qt crock pot (once a week), air fryer (once a week), breadmaker (currently a couple of times a week), Ninja type processer (time to send to the garage as SO has stopped making daily smoothies).
In a cabinet near the spice racks is a bladed coffee grinder I use for spices, a 'chop chop' mini food processor I use frequently for small quantities of garlic or onion or such to pulverize them, an electric knife, an electric hand mixer, an immersion blender, my remote thermometer for roasting meats and my instant read to check if smaller stuff is done.
Many of my 'tools' are gifts from back when we used to exchange Christmas gifts, but I have found them useful enough to not dispose of. If I were moving across country I probably would donate many of them and most I would repurchase from a thrift shop as needed in my new location. (That is my gauge for 'useful but not essential'.) Things I have disposed of include a peanut butter grinder, panini maker as well as some 'gifts' still in the original box.
A few decades ago I was commuting for a year to a location 350 miles from my home. I came home on weekends but had a kitchenette in an apartment I rented there. I purchased a used convection oven as the apartment had two hot plates but no oven. The oven was a couple feet long and about a foot deep with the actual oven able to handle a 12" diameter pizza. I was not impressed that it did anything better, only that it did it faster(ish). My air fryer won't handle a 12" pizza, but it definitely does a better and faster job on small items than my ovens. (I ditched the convection oven when I gave up the apartment.)
My real obsession, though, is good quality knives. I have collected them for over 50 years and have a great collection of 'old friends' who handle different kitchen chores with aplomb. There is a knife block of ones my SO uses that are okay but not 'old friends' and then there are a couple of knife blocks of mine. Every couple of years I have the knife sharpener guy come out and edge my good ones such that I can keep them extremely sharp with my steel. Sharp knives get the job done with less danger to the cook than trying to slice, trim or chop with a dull one.