I use Emacs as my daily driver but I also have Obsidian and I use that from time to on the Mac to do things like generate PDFs or work with some of the great Obsidian extensions.

To your point about editing in the phone, Obsidian has great iOS and iPadOS versions that work as well as the desktop version (albeit with some wackiness with some extensions that only work on the desktop version).

In combination, this gives me a seamless setup that is all text files (.md) and that works really well across all three form factors.