Why is Elon Musk so obsessed with Diablo IV?

I usually try to write about new games, but also indulge in a dig at Blizzard's open-world dungeon crawler Diablo IV this week, even though it came out last year. Why? Because in addition to trying to save American democracy and make humanity an interplanetary species, Elon Musk's third concern is Diablo IV. When he's not tweeting about the first two things, he's tweeting clips of himself shouting his way through them Diablois the endgame content that involves killing hordes of very high level demons in timed dungeon runs.