I think one of the big things we don't appreciate yet is fires. It's not so much "These things all explode" (they don't) or "wahh I can't put out the oxidized

I think one of the big things we don't appreciate yet is fires. It's not so much "These things all explode" (they don't) or "wahh I can't put out the oxidized fire, so much flame, so little water, make it stop burning" (a disruption primarily, you just wait for it to burn out), as it is "The electrolyte in lithium ion batteries is actually lithium HEXAFLUOROPHOSPHATE, which burns in a runaway self-oxidized fire to produce hydrogen fluoride and clouds of phosphoric and hydrofluoric acid." Tunnel fires were already pretty deadly when we were just talking about hydrocarbon combustion, but hydrofluoric acid day at work is something a lot of chemists will call out sick for. Casual momentary contact can kill or maim you. LFP still uses fluorine chemistry, but at least it's a lot less likely to burn when abused than NMC. It's going to take one poorly ventilated tunnel fire to trigger a legal mandate to use LFP over NMC forms of lithium ion.