I have not personally used a phone with a folding screen, but I work in customer service and I know our tech team has replaced a lot of them where the screen gets a crease in the middle or comes unlamented.
Honestly though the foldables seem kind of pointless to me. It gives a slightly larger screen that’s really of no use unless your phone is the only thing you use to watch movies/game on. It’s really more of a status symbol than anything else.
I’m sure someone will eventually come up with a more useful and innovative way of using foldable screen technology, but this is not it.