Whats the real value proposition of high-end e-bikes in terms of customer lifetime value and retention, considering that a significant portion of customers are only using them for casual, short-distance commutes, and given the rapidly decreasing cost of lower-end options that can still meet most peoples needs? Do e-bike manufacturers genuinely believe that customers are willing to pay a premium for a brand name or perceived quality when it comes to something as practical as a commuter vehicle, or is this just a case of companies trying to maintain profit margins in a rapidly commoditizing market? Furthermore, what role do after-sales support and service play in retaining customers and justifying the higher upfront cost of a premium e-bike, and are manufacturers doing enough to provide a meaningful ownership experience that keeps customers coming back for repeat business?