Also, I'm annoyed that this labels itself as supporting Markdown, but apparently can't actually handle actual proper Markdown links between files.
This is kind of a sticking point for me, because one app after another has gotten this wrong (see Ulysses' bizarro link editing, for example), and I'm just not going to use an app if it wants to make me convert all my files to a proprietary version of the syntax.
I can't reply to your post further down, but it seems like space characters aren't allowed by Markdown spec. Apparently you have to convert it to "%20" :(
For deeply nested posts, you have to click on the "X minutes ago" header to get the reply option to show up.
It looks like when I add the angle brackets that CommonMark allows to circumvent the spaces thing, some variations still don't work: https://i.imgur.com/nqiQnl3.png
For one more note, the obsidian.css thing for styling is deeply unintuitive, because you can't edit it from inside the app: if you make a note named "obsidian.css" at the root level, that gets ignored because it's actually obsidian.css.md, so you can only edit the styling with a separate app altogether to create/edit that file directly.
It's kind of gross that the only way to use that is to have it pollute your file space, rather than just having a document to open.
Also, on Mac it should be under the actual Help menu, the same way that there should be an Obsidian -> Preferences... menu item (hotkey cmd+,) to open settings. Conventions are important!
This is kind of a sticking point for me, because one app after another has gotten this wrong (see Ulysses' bizarro link editing, for example), and I'm just not going to use an app if it wants to make me convert all my files to a proprietary version of the syntax.