[nothisisntright]

> We can, and have, shut off large portions of the grid in seconds.

Speaking from personal experience, this is BS. During a bad wind event, a bunch of lines came down, started a huge forest fire around 10 or 11pm which was heading for a small town with 50-70mph winds. First responders couldn't get in to warn anyone because the downed lines were energized, so they called up the power plant. The whole process to de-energize took hours. There is a kill-switch now, but most power plants apparently can't shut off the juice in a matter of seconds, and they may not even have a plan to do so in an emergency.