Basically it's funny because this is yet another "battery of the week". Every week there is one or more announcements of some new battery tech that will overthrow the current batteries in two months (or weeks). Often they work fine at -185 C, or in a clean room, or cost seven figures per battery, or have other practical issues. For use in transportation, batteries need to have a fairly long history as a product so that the gotchas are well known--this typically means about ten years in production on non-transportation or critical applications. So it's funny, but not in a very humuorous way.