How do you feel about stores that are open 24 hours a day?

Do these exist where you live? Are they common? How often do you use them?

There’s a grocery store in my town that’s open 24 hours. I think it’s kind of strange. I’ve only been there past ‘typical’ grocery store hours once, when I was helping a friend whose cupboard was bare and needed a ride. But I suppose that such stores are welcomed by people who have social anxiety or PTSD.