Comment by Hypx

Battery energy density hasn't moved much at all. At best, we're at around 270-280 Wh/kg, and that requires a huge departure from our early understanding of battery safety. The early BEVs were relatively safe, even in a severe accident where the cells are damaged. In modern BEVs, any puncture or damage to the cell is a fire hazard. We've pretty much accepted that all BEVs are extremely flammable. Tesla has nothing of note, and ultimately they're lying or greatly exaggerating what they have.

> Where is that happening exactly?

It is happening everywhere simultaneously. Right now, tens of billions of dollars are being invested in hydrogen and fuel cell technologies. Anyone who pays attention knows that the revolution is happening as we speak.