Question: If this was a simple fix (disabling Wave) for a convenience feature (waving instead of having to reach and hit a button), then why are they stopping sales? It would seem logical to update all unsold devices to disable Wave and continue on with sales.<p>Safety concern, slightly. Nest has made note that this feature have never been compromised yet (then again, its the one time when the Wave does fail that caused a huge issue so this point is null). Also, the Wave feature does not affect the detection of smoke, only the resulting alarm.<p>I think there is something else going on here. Possibly a more serious safety hazard. If a software update can solve the Wave issue, then why the stopped sales? If there are stopped sales, why not a more serious email/note or a recall?