On the other hand, one could say that human brain can be described as a collection of interconnected subsystems, acting more or less coherently and coordinated by neural activity, that one perceive as stream of consciousness. Thus, stream of consciousness can be seen as a unifying tool, which allows to treat human brain activity as single agent operation. This point of view, while remaning reductionist-compatible, allows to reinforce perception of self as a real acting agent, thus, hopefully, reinforcing underlying neural coordination activity and making brain/oneself more effective.

I'll be convinced that personal identity is a subjective preference, if one can explain strange coincidence: only "tomorrow I" will have those few terabytes of my memories.