https://www.cnet.com/news/ces-2019-shows-the-foldable-phone-revolution-will-be-awkward-but-essential/

I tapped the screen, and nothing happened. When it finally did, another widget popped over the main menu. I folded out the display, and waited for the screen to reorient itself. And waited. Tap, tap, tap. Nothing, nothing, nothing. It was definitely not ready for prime time.

To be fair, the phone I tried out wasn't a commercial-ready unit yet, and the Royole engineer who showed me the phone said updates were coming daily.