I have 1.6 million files on my computer at the moment. Not sure how they'd map to bumptop. Even just photos; all the demos I've seen limit files to only a dozen or so. How would you manage a few thousand photos?
1.6 million files break down in most viewing paradigms. In BumpTop you can turn on "infinite workspace" and you can have thousands of files. Then use pile by type or date to automatically make that more manageable.