Is travel through stable macroscopic wormholes between remote points of spacetime going to be possible in a definitive theory of gravity, be it string theory or something beyond it?
Physicists level of understanding about the holographic principle and AdS/CFT correspondence has improved significantly and continues to evolve, as it is suggested by the current ongoing debate regarding black hole firewalls.
I understand that the semiclassical picture of wormholes cannot survive because string theory demands that the required positive energy conditions are satisfied, so nontrivial classical topologies are censored from geodesically-complete world lines, just like naked singularities. But i cannot help but wonder (and hence my reason to do this question) if all the thorny subject about information being conserved by unitarity, while at the same time, holography implying there is a connection between all the boundaries of the bulk spacetime (understanding as such the union of the cosmological horizon and all the black holes in its interior), could allow room for solutions where the infalling information in black holes survives by coming out, scrambled or otherwise, out of some other distant event horizon (behaving at times as a white hole, at others like a black hole)