Summary: The paper titled "Saturn's Interior After the Cassini Grand Finale" presents a review of Saturn's interior structure and thermal evolution, with a focus on work done in the past 5 years. The authors discuss how data from the Cassini mission, including a precise determination of the gravity field from the Grand Finale orbits, and the identification of ring wave features in Saturn's C-ring tied to seismic modes in the planet, have led to significant advances in our understanding of Saturn's structure. They suggest that differential rotation, as seen in the visible atmosphere, extends down to at least a depth of 10,000 km, and that a central heavy element concentration ("core") exists, which in most recent models is 12-20 Earth masses. The authors also discuss the relevance of magnetic field data on understanding the planet's current interior structure and point towards additional future work that combines seismology and gravity within a framework that includes differential rotation, and the utility of a Saturn entry probe.