A new preprint (arXiv:2603.26700, not yet peer-reviewed) uses the MIROC4m coupled atmosphere-ocean climate model to simulate the transition to a modern Snowball Earth. In this modeling study with no observational sample size, researchers abruptly reduced the solar constant to 94% of present-day levels. The simulation shows the planet reaching full global ice cover after roughly 1,300 years, accompanied by rapid sea-ice thickening. During the onset phase, sea-ice formation and melt in mid-latitudes freshen surface waters, creating strong salinity stratification that initially collapses deep-ocean circulation. The model then shows the meridional overturning circulation partially recovering within several hundred years due to brine rejection from continued ice production. Limitations include reliance on a single model, idealized instantaneous forcing rather than gradual change, modern continental geography, and the absence of evolving land ice sheets. The preprint focuses tightly on these ocean dynamics but misses broader connections to contemporary risks. Synthesizing with Lenton et al. (2008) in PNAS on climate tipping elements, which flags AMOC collapse as a high-impact threshold, and Hoffman et al. (1998) in Science describing geologic evidence for Neoproterozoic Snowball events, reveals recurring patterns: ocean stratification and circulation shutdown act as amplifiers. What current coverage often overlooks is that similar freshening processes are already underway from Greenland and Antarctic melt under anthropogenic warming. While the paper explores cooling to Snowball conditions, the underappreciated insight is how ocean circulation shifts can function as catastrophic amplifiers regardless of initial direction, potentially locking in extreme states far faster than atmosphere-only models suggest. This highlights the need to treat ocean feedbacks as first-order drivers in tipping-point assessments rather than secondary effects.