Considering the growing trend of incorporating step-through frames in commuter bikes, what specific design elements and features make them advantageous for daily use, particularly in terms of comfort, practicality, and safety, and how do these advantages impact the overall efficiency and performance of the bike in a real-world urban setting, as opposed to the more traditional diamond frames commonly associated with performance-oriented road bikes, taking into account factors such as weight distribution, standover height, and ease of mounting and dismounting in heavy traffic or when wearing bulky clothing and accessories, and are these benefits applicable to riders of varying skill levels and riding styles or are they more suited to specific demographics or use cases, such as short distance commutes or running errands in a densely populated area?