Folders impose a tree shape to file organization which then has to be awkwardly worked around with symlinks, indexes and whatever the heck those library things on windows used to be.

That said folders are useful as a concept, but maybe flip things so that the folder is a tag on the file, and I can "move" or "copy" a file by changing its tags. And still present a visual folder structure by default in the file browser.

The biggest loss with this approach is namespacing... Not sure what the best option there is.