I don't blame you for not knowing about this flag. Here's its description in the manpage:
> Disable folding of newly stowed directories when stowing, and refolding of newly foldable directories when unstowing.
This is confusing because it's a circular definition. It doesn't explain what "folding" means. It should just read, "prevents creation of symlinked directories" or something.
For example, on a machine where ~/.config/autostart/ doesn't still exist, I do not want that either ~/.config or ~/.config/autostart are created as symlinks to my stowed package; otherwise any newly installed file, from unrelated apps, would end up in my package! I just want this path to exist as a proper dir, and only contain whatever symlinks are needed from stow. Thus an `mkdir -p` is still needed before running stow.
On the other hand, I do want that ~/.config/wireshark/ is a symlink to the stow repository. So no mkdir in this case.
Regardless, having a script that adds extra per-package pre-process/post-process logic before/after running stow is still needed, anyway.
It's handy but sometimes a bit of manual preparation must be done on a new clean machine. For example if you want to stow only some files under ~/.config/program/ and not the whole program/ directory, you must first run an mkdir and then run stow to put the appropriate symlinks in place.