Version 2.0 of the NVM Express specification has been released, keeping up the roughly two year cadence for the storage interface that is now a decade old. Like other NVMe spec updates, version 2.0 comes with a variety of new features and functionality for drives to implement (usually as optional features). But the most significant change—and the reason this is called version 2.0 instead of 1.5—is that the spec has been drastically reorganized to better fit the broad scope of features that NVMe now encompasses. From its humble beginnings as a block storage protocol operating over PCI Express, NVMe has grown to also become one of the most important networked storage protocols, and now also supports storage paradigms that are entirely different from the hard drive-like block storage abstraction originally provided by NVMe.