The bone projection study has been pretty much debunked: https://arstechnica.com/science/2019/06/debunked-the-absurd-story-about-smartphones-causing-kids-to-sp

The bone projection study has been pretty much debunked: https://arstechnica.com/science/2019/06/debunked-the-absurd-story-about-smartphones-causing-kids-to-sprout-horns/ https://arstechnica.com/science/2019/06/debunked-the-absurd-... That said, the current mobile situation is not great on posture.