Lithium overhyped... Lithium is basis for old technology. Main issue is that there really is no "safe" Li-ion or LiFePO4 or any other Li based chemistry battery. Solid state batteries using other metals are now commercially available, no fire hazard and offer more energy density. Some ss batteries do use lithium but those have the same fire risk as other Li based batteries. Safer types of ss batteries use cheaper metals so use of lithium may be curtailed going forward due to its cost and reactivity risk.