The only time I’ve ever seen a folding smartphone in person it had a huge, extremely noticeable crease across the screen. The phone was otherwise in good shape from what I could tell.
When foldable screens first came out I thought to myself, “wow that’s pretty neat, but what will it look like after several months/years of typical usage? It’ll probably have a crease noticeable enough that I would never want to use one.” Turns out I wasn’t too far off. No thanks, I’ll stick with a regular screen.
The major problem with ads isn’t that they are a visual and audible nightmare (although that IS a problem), it’s that they can affect performance and are vectors for malware.