<from discussion with Simon>

For swarming, a quarantined bot is alive but in an unrecoverable brokenness.

Historically, we used to set hot devices as quarantined so that they would stay alive but not get tasks.

The challenge is that quarantine, for Swarming, means broken, so that if there's exactly one bot that can run a task and the device is overheating, the server will deny the task with NO_RESOURCE.

In practice, hot temperature can be considered "maintenance downtime", so this makes "sense" if you think hard enough. :)