+1
(I would also give it +10, if this were possible… 
)
This would be a major step into a good direction, and I don’t think it’s too difficult to implement. The feature could be located in the outline window in the right pane. (That’s how it is done in Zettlr, as far as I remember.) Either as a drag and drop procedure, or with Selection+Shortcuts. You can also get inspiration on that from Mindmapping Apps like the gorgeous browser-based MindMup, where you move nodes by shortcuts as simple as Ctrl-Up and Ctrl-Down.
Greatly looking forward to this, would make my love affair with Obsidian even more persistent. (Actually, not being able to move folded sections / outline items made me leave Visual Studio Code…)