SurfaceBook is a great and innovative product. It has detachable keyboard base and each clipboard is compatible with any other base (as it was advertised). This means that user can in theory upgrade his/hers laptop performance or battery life just by changing keyboard base.

But, unfortunately, you can't do it because keyboard bases have not been sold separately. This means that in order to change only keyboard part user must buy whole new SurfaceBook which is very expensive.

Selling separate performance bases will also help with replacing damaged SurfaceBooks.