Considering the unique design and Lefty suspension of the Cannondale Topstone Carbon Lefty 3, do owners truly believe its worth the hefty price tag, especially when compared to more traditional gravel bikes with similar specs and performance capabilities, and if so, what specific features or benefits do they think justify the extra cost? Is the added comfort and traction from the Lefty suspension enough to offset the potential drawbacks of a less conventional design, or are owners simply paying a premium for the novelty and exclusivity of owning a Lefty-equipped bike?