Sure can, full disclosure, copied from a comment below: Thanks for the question! Mountpoint for Amazon S3 is a FUSE layer that doesn't support full POSIX seman

Sure can, full disclosure, copied from a comment below: Thanks for the question! Mountpoint for Amazon S3 is a FUSE layer that doesn't support full POSIX semantics. For example, you can't use Mountpoint for Amazon S3 for random writes to existing files, appends, or renames. This means that you have to carefully instrument your application to understand whether or not it's compatible with Mountpoint, which can be error-prone. Regatta, on the other hand, provides full POSIX compatibility for the file interface, which means that it works out-of-the-box with all file based applications.