What specific factors contribute to the opinion that electronic rear derailleurs are superior to their mechanical counterparts, and are these advantages significant enough to outweigh the additional cost and potential for electronic component failure in a performance-oriented riding context where reliability and precision are paramount, and if so, can these advantages be quantified in terms of improved shifting performance, reduced maintenance requirements, or enhanced overall riding experience, particularly for riders seeking to optimize their competitive edge through equipment upgrades rather than solely relying on physical training gains, and how do the benefits of electronic shifting systems extend beyond the realm of professional or elite-level competition to offer tangible improvements for dedicated amateur cyclists as well, particularly those who log high weekly mileage and prioritize the reliability and performance of their gear.