Prototyping is exciting not for the current functionality within this release but for where this can eventually lead in future releases. Sketch have been brave releasing this in true MVP fashion. Prototyping could be way more advanced in Sketch 49, however, just how useful would it prove to be if that were the case? The link and hotspot features, in addition preview and share in the cloud are ideal for first launch and I cannot wait to see what Sketch has in store for its prototyping roadmap.