Wait. If there truly is not a setting for this then it makes finder unusable as a file explorer and arguably the entire OS. Recursive merge is one of the most fundamental things a personal computer does.
You can go out of your way to do it manually with rsync and similar tools, of course, but by default you're moving directory pointers around, not merging trees.
Nautilus, the default file manager of GNOME (and by extension Debian and its children such as Ubuntu) handles recursive merge. This isn't an issue on Linux.
It's obviously bad design to have something as high level as a file manager be a glorified 2D wrapper of 2 command line tools.
Not even slightly:
$ mkdir 1 2
$ touch 1/foo 1/bar 2/baz 2/quux
$ mv -T 2 1
mv: overwrite '1'? y
mv: cannot move '2' to '1': Directory not empty
$ mv --force -T 2 1
mv: cannot move '2' to '1': Directory not emptyThere are applications with more than one window.
> * weird scroll acceleration that makes clicky scroll wheels unusable This is called "progress" or UI/UX or whatever name they have today for brain damage . Some years ago the Apple GUI was looking good. Then the replaced the window buttons with coloured circles. Guess which one is which ?
And windows handles it just fine. Clicking X on one window doesn't close the entire app.
Command-Q is your friend.
..which promptly get replaced with mac annoyances. Random ones off the top of my head:
* closing a window (using the red x icon) doesn't close the app
* overwriting a folder deletes existing contents, rather than merging them
* weird scroll acceleration that makes clicky scroll wheels unusable