The quintessential examples being Traitor Roberts 0Don’tCare rulings.
It was better when Roberts stayed silent.
Writing opinions which may be either concurrences or dissents is a long-held tradition among the Associate Justices, and there is no requirement that all the Justices speak with one voice.
Concurrences or dissents may prove to be very useful in those instances where the Court is compelled to revisit an earlier opinion. These opinions are very much like the Federalist Papers in explaining the Constitution, insight into what the reasoning was at a given moment in time.