What can the most liberal justice accomplish on the most conservative court in decades?

‘Sotomayor is … poised to take over Ginsburg’s role as the functional minority leader. There are calls for 82-year-old Stephen Breyer to retire while a Democratic president and Senate can replace him, and Joe Biden has promised to nominate the first Black woman to the Court. On a Court that runs on seniority, Breyer’s move would anoint Sotomayor as the most senior justice in what is usually, in the most heated cases, the resistance — the true heir to Ginsburg and, before her, John Paul Stevens and Thurgood Marshall….’
— via New York Magazine