Some relevant pieces on this subject I’ve read somewhat recently:
Noah Smith’s argument that American pop culture is stagnant in part because we’ve “mined out” some of the creative fields that new tech has unlocked.
Robin Hanson’s “This is the Dreamtime”, which is about how the present moment is uniquely ripe for both art and impact on the world.
Bostrom’s new book Deep Utopia, which spends most of its run on the limits of what he calls “objective interestingness” and whether we’d have enough to satisfy us ~forever without structural modifications like removing boredom.
By the time you have AIs capable of doing substantial work on AI r&d, they will also be able to contribute effectively to alignment research (including, presumably, secret self-alignment).
Even if takeoff is harder than alignment, that problem becomes apparent at the point where the amount of AI labor available to work on those problems begins to explode, so it might still happen quickly from a calendar perspective.