As ADAS-equipped vehicles begin to incorporate higher levels of automation, having a robust understanding of the sensors that enable these more advanced features is critical to understanding the way in which features can be expected to perform under diverse environmental and situational conditions. There is still a large gap in the technologies on the roads today between the Level 2 systems that have emerged and are becoming more commonplace and the Level 4, near-Level 5, AV vehicles driving around our various cities. The presentation will discuss evolving sensor technologies, and how testing at the edge of edge cases can uncover their functional capabilities and limitations.