Dumb question: is Obsidian anything more than an open source version of Apple Notes? I realize there's technical differences but from a use cases / feature perspective - isn't it essentially the same?
Apple Notes is great, but can't do things like tagging/graph view and doesn't allow you to export in a standardized format.
Obsidian is a superset of Markdown (with a few modifications for page embedding and wiki-links) and allows you to sync with anything that provides a way for you to upload a folder of text files.