I was thinking about that boat fire amongst others. LiFePO4 certainly is safer - good to know. Puncturing has more rapid consequences than shorting. I've witnessed two lead acid fires. I happened to be near by when a mechanic was welding the chassis of a vehicle belonging to me with a non sealed battery charging near by. The explosion was deafening, acid everywhere and a fire with a fuel source. The other was a short in a 4x4 I'd just purchased. Perhaps LiFePO4 is safer than some existing alternatives.
That said, the aluminium-ion battery can be punctured whilst in use with no adverse consequences other than declining voltage. Eventually, this battery is tipped to be a fraction of the price of the lithium equivalent. Could be some years though, even if commercialisation proceeds forethwith.