In particular: the first reference describes three hypotheses about how oxytocin does what it does (the two described here, plus a third: generalized reduction in anxiety) and says: these all seem kinda plausible, especially the one about increasing the salience of social cues, but we don't know which if any are actually real and further research is needed to figure that out. Has that further research now been done and decisively confirmed two of the paper's hypotheses while decisively refuting the third? The paper lists understanding the interactions between these hypothetical mechanisms for oxytocin and the individual context as an open problem. Has further research now been done that conclusively settles that problem?

The claims made in this article seem plausible enough. But it would be useful to know how much support they actually have.