When selecting mirrors for an ebike, is it more practical to prioritize aesthetics or functionality, and what are the trade-offs between these two considerations? Are there specific design elements or features that should be considered essential for ebike mirrors, such as wide-angle lenses or vibration-dampening mounts? Should ebike owners opt for traditional bar-end or stem-mounted mirrors, or are there newer, more innovative designs that offer improved visibility and reduced blind spots? What role do survivability and durability play in the decision-making process, particularly for ebikes that will be subjected to heavy use or harsh environmental conditions? Are there any mirror designs or technologies that are specifically tailored to ebike usage, and if so, what advantages do they offer over more generic options? Can the effectiveness of an ebike mirror be quantitatively measured, or is it a largely subjective evaluation? How do different countries or states regulations regarding ebike accessories impact the choice of mirrors, and are there any trends or best practices that are emerging in the industry?