Hi! I'm considering getting into Emacs for knowledge management and note-taking using org-mode and org-roam and see how it compares to Obsidian.

I have three questions:

1. How can I use Emacs on mobile and sync across all of my devices? I need cross-platform usability, especially since I plan to use it on both my iPhone and iPad. I've tried Beorg, but it seems like it's only for task management.
2. How can I integrate it with modern apps and services (e.g. Readwise)? This is something that Obsidian has, which I want to implement in Emacs if it's possible.
3. What does Emacs have over Obsidian? Has anyone here switched from Obsidian to Emacs?

Thanks.