I think what a lot of people miss about jevon's paradox is the elasticity of demand of the underlying resource
textiles had jevons paradox, and many more textile workers were employed even when textile machines were being created, until we saturated the demand for cheap clothing in the world and then textile workers were kaput (same for farming, and horses)
software is currently undergoing jevons paradox, but it's very unknown how high the ceiling of demand for software is. web dev might be doomed, but software in general i think is probably limitless
Intelligence is also probably unbounded (atm software and intelligence are very closely tied together). its very possible token spend rides up the curve forever.
Brings up the question of what the intelligence is used for. Humans exploited intelligence for competition. With each other to wipe out other Homo species, mate more and collect resources, with other animals to limit predator impact and gain food. Intelligence will be used offensively by corporations and their people to extract more from consumers (make pricing opaque, terms of service more complicated, etc.) and scams far more sophisticated. The "consumer" will need extra intelligence to fight all that off. There are only so many meals you can expertly produce, shirts to fold, itineraries to fun places you can execute, but there's a practical infinity of traps to set and avoid.