Sorry for being a bit off-topic but I'm fascinated by Elon's boldness in claiming that hydrogen fuel-cell tech is a dead end for automakers even though they are

Sorry for being a bit off-topic but I'm fascinated by Elon's boldness in claiming that hydrogen fuel-cell tech is a dead end for automakers even though they are doubling down in it's investment. I would love to be knowledgeable enough to have a reasonable opinion on this topic. Could anybody recommend reading material where I could learn about some of what Elon is doing, what automakers are doing and what the pros vs cons are of both without getting too intimidated by the science behind it?