Smartphones replaced separate entertainment devices because they combine music,...

https://trentonsexcellentthoughtss.evergrovio.com/posts/why-do-i-open-my-phone-repeatedly-for-just-a-minute

Smartphones replaced separate entertainment devices because they combine music, games, videos, and more into one easy-to-carry gadget. Mobile-first design needs to prioritize simple navigation and quick load times so users can jump in anytime