Just found out that you can embed images through HTML tags on dotted folders:
<img src="app://local/Users/cusername/Documents/obsidian_notebook/some_folder/subfolder/test.jpg">
Now I can set Obsidian to save attachments, by default, in a subfolder named “.attachments” in the same folder as the MD file, which is the ideal classification scheme IMO, but now pasting images directly in Obsidian’s editor no longer works.
So that’s some kind of workaround, although it’s not perfect.
Still waiting to know how all those nice published notes made with Obsidian hide all their attachments!