Stuff that needs low-level access to the file system. You can now handle that at a crude level with web form file uploads and generating dynamic data URLs for d

Stuff that needs low-level access to the file system. You can now handle that at a crude level with web form file uploads and generating dynamic data URLs for download, but it's still not as smooth as using the native file system. Edit: one example would be a file backup system. There's no way you want to make the user manually select and upload every single file on the HD for something like that, and (for obvious reasons) there's no way for a web app to scan the disk and read arbitrary files.