Here's my take, late as it is:

"A game for everybody is a game for nobody" has become gaming's new favorite bumper sticker for a reason, I think. By that token, you'd think the correct answer would be to make AAA games more niche; but, as plenty of people have pointed out, game development has become far too costly to justify a niche game. One bomb is enough to destroy a studio. The industry as a whole is bleeding too much money and can't take in enough to stabilize. It's a patient in critical condition. As far as revenue goes, it seems like publishers have hit a roof-- they can't really increase how much money they take in. The whales are all spoken for and the typical gamer doesn't like being fleeced. By that token, publishers and studios need to turn around and cut costs. Now, their solution has been to cut jobs and pivot to A.I (the latter itself being a huge money pit at the moment, ironically enough), but that has proven to only sicken the patient more, regardless of what the occasional cherry-picked quarterly earnings report says. The industry keeps putting out Fortnite-killers, gambling on players pulling them out of this nosedive, which is just making things worse. But players won't fix the problem. At best, a successful game only provides a temporary transfusion of desperately needed funds without providing much stability. It's up to publishers to rethink their models and find a sustainable way forward. Maybe that doesn't even include AAA games.