I think the hybrid view you discuss is in fact compatible with some versions of actualism (e.g. weak actualism), as entirely preference-affecting views (although maybe not exactly preference-affecting in the informal way I describe them in this post), so not necessarily hybrid in the way I meant it here.
Take the two outcomes of your example, assuming everyone would be well-off as long as they live, and Bob would rather continue to live than be replaced:
Bob continues to live.
Bob dies and Sally is born.
From the aggregated preferences or attitudes of the people in 1, 1 is best. From the aggregated preferences or attitudes of the people in 2, 2 is best, if Sally gains more than Bob loses between 1 and 2. So each outcome is best for the (would-be) actual people in it. So, we can go for either.
So, not all preference-affecting views even count against this kind of replaceability.
My next two pieces will mostly deal with actualist(-ish) views, because I think they’re best at taking on the attitudes that matter and treating them the right way, or being radically empathetic.
Good point about the degree of identity loss.
I think the hybrid view you discuss is in fact compatible with some versions of actualism (e.g. weak actualism), as entirely preference-affecting views (although maybe not exactly preference-affecting in the informal way I describe them in this post), so not necessarily hybrid in the way I meant it here.
Take the two outcomes of your example, assuming everyone would be well-off as long as they live, and Bob would rather continue to live than be replaced:
Bob continues to live.
Bob dies and Sally is born.
From the aggregated preferences or attitudes of the people in 1, 1 is best. From the aggregated preferences or attitudes of the people in 2, 2 is best, if Sally gains more than Bob loses between 1 and 2. So each outcome is best for the (would-be) actual people in it. So, we can go for either.
So, not all preference-affecting views even count against this kind of replaceability.
My next two pieces will mostly deal with actualist(-ish) views, because I think they’re best at taking on the attitudes that matter and treating them the right way, or being radically empathetic.