The functional advantage should be obvious as soon as you open a book or website.

Particularly so if the content has a table, grid, or similar.

Typing isn't perfect, but it's somewhat better.

Photos and images are so much better on the foldable.

For videos the advantage isn't so great, but at least you don't need to rotate the phone. You can watch both horizontal and vertical content.

Considering how most customers prefer a large phone, I'd rather bet on foldables becoming the default.