My feeling is that Tesla will offer FSD rental in the $100-$150/month range, as anything more than that will simply not be acceptable to most ppl. But that makes the full purchase price unsustainable, since ppl will do the math and realize it's always cheaper to rent.
They COULD lower the full FSD purchase price, but my guess is they will do something more cunning: Make FSD purchases transferable (that is, you own FSD for life, rather than it being attached to the car). For customers, this makes FSD purchase make more sense, since they can take it with them if/when they get a new Tesla, and for Tesla is makes sense since it encourages customers to stay with Tesla models as and when there is more EV competition.
They COULD lower the full FSD purchase price, but my guess is they will do something more cunning: Make FSD purchases transferable (that is, you own FSD for life, rather than it being attached to the car). For customers, this makes FSD purchase make more sense, since they can take it with them if/when they get a new Tesla, and for Tesla is makes sense since it encourages customers to stay with Tesla models as and when there is more EV competition.