The standard appliances. For example, most people in developed countries have a dishwasher, which may or may not be worth the cost and room used. Most people probably would want a refrigerator, microwave, stove, and washer/drier if they thought about it.… but most people probably haven’t thought about it. I personally do not have a dishwasher, microwave, or dryer because they are not worth the room they take up. I know some people who would do just fine with a chest freezer but no refrigerator, and/or with a microwave but no stove; I lived for a year without a refrigerator with no troubles (but I was in a part of the world in which no one had a refrigerator, which helps a lot).
This is particularly interesting habit, since many people spend a few years in college with few if any of these appliances, but automatically assume that they need them once they get a apartment/house.
(FWIW, I am not a radical minimalist nor particularly efficient; I have a rice cooker, electric kettle, and toaster oven, which are technically redundant since I also have a stove and oven.)
Spend more time dumpster diving (treasure hunting is fun!)