It is a lot like demand for spacious pockets in fashionable clothing. People largely think you can get that with no tradeoff on anything regarding the clothes. And, you just can't.

So, for phones, people say they want a small one to fit in your pocket. With, fair. But that generally means a smaller screen when you are using it. Which people don't really want.

Foldables help a ton with this. And I think that will ultimately pan out. People are understandably worried about being early on that train, though.