I think it is a perfectly legitimate question. I had two reasons for creating this: a practical one and a theoretical one.

The practical one is that I wanted to be able to store disk data in a cloud storage bucket (i.e. "format" a bucket with NTFS and use it as a disk). For various reasons I did not want to build this as a WinFsp or FUSE file system.

The theoretical one is that I am exploring the possibility of writing a new OS where all/most IO/services/etc. could be implemented either in kernel mode or user mode. Not bolt it onto an existing OS like I have done with WinFsp and WinSpd, but build the OS like this from the ground up.

To finish here are some use cases for WinSpd as food for thought:

- Mounting virtual disks in a format other than VHD.

- Mounting a cloud storage bucket as a disk.

- Serving a read-only disk from an internet location for use by multiple users.

- Tracking disk I/O for backup, snapshotting or other purposes.