Today, the Leaven K620 driver is impossible to find in the wild. The last known copy was on a SyQuest EZ135 drive that suffered catastrophic platter degradation in 2004. However, a fragment was recovered via magnetic force microscopy—enough to emulate its core logic in Python.

The emulation revealed a final surprise: the driver contains a tied to the real-time clock. If the system date ever exceeds December 31, 1999, the driver enters a "proof-of-work" loop, calculating prime numbers until the system overheats. This was not a Y2K bug, but a deliberate kill switch. Leaven Corp didn't want their hardware to exist in the new millennium.