There are no necessities. It's not necessary to be alive.

But the standards to feel nice and pampered... I really like indoors plumbing, electric, radiators and running water. Maybe because I have lived without.

But at the same time I feel mentally better when I'm in my second home (which is a luxury), even if it comes with an outhouse and well water. Does have electric though and I must say it makes a huge difference in comfort. You don't have to worry about light, you can have a computer if you like, you can cook on a stove and heat dish water.

Since I was a solitary child, I don't feel it was a luxury to have my own room, without it I would have gone insane. Also I've always had cats, and I can't see my life without cats so I don't see them as luxury either.

So depends on who you are I guess.

I still lack what most people in my country have. I don't own a car. I don't have a freezer. I'm renting from a slum lord that keeps upkeep to a minimum like I had no shower for 2 months and something is always broken. He doesn't heat to a comfortable temp in winter. We have a common laundry room that is always booked. My clothes are like half a decade old, my comp is 10 years old bought used, no smartphone, no cable TV, no budget for haircuts, whole meats, fish, eating out, vacations abroad.... People these days have so much. And most of it is junk! They don't even have the brains to get something good for their money! Like "I had to have this lamp even if it cost 300 dollars". Seriously????

I still have more than necessities.

Oh yea... and if you happen to have bar soap and no shampoo, you can wash your hair with that if you also have a slightly acidic rinse. Like if you happen to have apple vinegar, a tablespoon in a cup of water is a good rinse that will make your hair less course, because it neutralizes the alkaline from the soap.

And yea, it wouldn't bother me one bit if I suddenly got filthy rich.... Ha ha!