The advancement isn't that we now have a better recommendation algorithm, it's that we thought that there was a problem that was impossible to solve with current computers and was being used as example of a problem that only quantum computing could solve and we've now learned that that isn't the case.
this is a recommendation right? hard to understand your point here
Besides, "subjectivity" concerns the subject, "objectivity" the object. The former is a matter of how an object is received by the observer, and so all perception is subjective in that sense; it can't be otherwise. But the subject can become an object of another subject. We can infer with varying certainty what someone is more or less likely to enjoy based on our knowledge of what they like.