This, this, and this. If you hear about a breakthrough from CATL or BYD, treat it with cautious optimism. If you hear about a "breakthrough" from anyone else (especially if they're not a Chinese company), laugh it out of the room.Elon noted a few years ago that 9/10 of "revolutionary new battery discoveries" were complete BS. The 1/10 was often just a mild improvement.
As usual, what happens under controlled lab environments is irrelevant. The only thing that counts is commercialisation and mass production. Until we have something available to customers - at a competitive price - then it should be treated as vaporware.