: Avoid relying solely on hyper-standardized metrics; leave room for qualitative milestones and creative problem-solving.

If you are producing a feature on this topic, it would likely focus on the intense physical "work" required to join the elite ranks of speed. The Milestone

) is an impressive athletic milestone. While elite sprinters can peak near 27 mph (

: Multi-modal commuters who need to transition from the street to a train, bus, or office elevator [落地 1.5.4]. 2. High-Efficiency Electric Bikes