"Unfortunately, the client that exists today is still pretty much the prototype design"

This quote by Shawn Fanning suggests that the present client design is not yet completely established. It indicates that the client is still in the early phases of development and is not yet prepared for complete usage. This could suggest that the client is still in the prototype phase, where it is being checked and improved upon before being launched to the public. It might also suggest that the customer is still in the style phase, where the features and functions are being figured out and carried out. In either case, the client is not yet prepared for complete usage, and further development is required prior to it can be launched. This quote highlights the value of continuing to establish and fine-tune the customer design in order to guarantee that it meets the needs of the users.