The risk isn't meltdown - it's emergency shutdown. Did you read TFS?
Actually, according to TFA, the risk is reduced ability of the emergency cooling systems to operate. This is basically what happened in Fukushima, and it led to something much worse than emergency shutdown.
40 dollars is enough for an attacker to take full control of a $30,000 drone
That's quite a decent ROI, even allowing for depreciation.
possible hardware failures/breakage
Maybe I'm being naive here, but has anybody actually experienced hardware failure through Beta testing?
The absence of labels [in ECL] is probably a good thing. -- T. Cheatham