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

https://ellassuperinsights.opalvector.com/posts/why-do-mobile-services-prioritize-clear-navigation-and-quick-loading

Smartphones replaced separate entertainment devices because they combine music, games, videos, and more in one pocket-sized gadget. Mobile-first design needs to get navigation and usability right. For example, easy one-handed use matters a lot