Instead of downvotes, I'd appreciate being suggested alternative papers that same year that made more progress towards training data privacy in ML algorithms th

Instead of downvotes, I'd appreciate being suggested alternative papers that same year that made more progress towards training data privacy in ML algorithms than the one mentioned in the article, and which should have won the prize instead. Otherwise, it seems my assessment would hold. A ranking is relative, so doesn't tell you much of absolute progress towards the goal.