Is it really worth the financial investment and added weight to upgrade to electronic shifting for racing, considering advancements in mechanical shifting have narrowed the performance gap, and some professional teams still opt for mechanical shifting due to its reliability and simplicity, especially in extreme weather conditions, and what factors should be considered when making this decision beyond the often-cited benefits of electronic shifting, such as faster shifting and reduced maintenance, and do issues such as battery life, compatibility, and the potential for electronic component failure outweigh the benefits of electronic shifting for the average competitive cyclist.