> What if you don't want the same applications with the same interface modalities on different devices?

In an ideal world, you'd be able to choose from a variety of programs, to optimize for your usecase, all while maintaining data portability/sync.

Convergence is a practical choice to allow contributions to be shared by desktop and phone users.

https://amosbbatto.wordpress.com/2020/08/05/advantages-of-ph... discusses this.