Currently when I paste an image from the clipboard it is placed inside my images folder right off the root. And it’s displayed fine.
But when I look at the Markdown then the path to the image is missing, it just says 
When I move the file to some other folder the image link is changed. The image folder name is prepended:  The image still is displayed fine.
What bothers me, though, is that I cannot open the file with a regular Markdown editor and see the image displayed. The path is missing or wrong. The Markdown editor does not not anything about some global Obsidian image (or attachment) folder.
I like to see as many Markdown features working seamlessly in other Markdown editors. Sure, some magic will be Obsidian’s job
But that to me lies more in how it interprets Markdown, not in how it stores data. The anatomy of the Obsidian “database” should be as close to regular Markdown files and folders a possible, I think.