> The already have low flammability. Low rates of spontaneous thermal runaway, sure, but they still are extremely flammable if externally ignited or physically

> The already have low flammability. Low rates of spontaneous thermal runaway, sure, but they still are extremely flammable if externally ignited or physically damaged. A house fire that could otherwise be put out might turn into a full disaster. An earthquake that physically damages the battery pack could cause a fire that would have otherwise not happened. A flood or minor tsunami might allow for early evacuations and most lives saved, but now the entire town is on fire instead of just water damaged, if every house has a massive lithium pack in their basement.