What are some potential consequences of having too much play in a rear derailleur, specifically in terms of its impact on shifting performance, and how can these issues be mitigated or prevented through proper adjustment or maintenance. When a rear derailleur has too much play, does the extra movement cause the derailleur to overshoot its intended gear, resulting in inconsistent or imprecise shifting, or does it instead cause the derailleur to hesitate or lag when shifting, leading to a slower or more labored shifting process. Are there any specific derailleur designs or configurations that are more prone to these types of issues, and are there any particular adjustment or maintenance techniques that can be used to minimize or eliminate the effects of excessive play. How does the type of cassette or chainring being used affect the impact of excessive play in the rear derailleur, and are there any specific combinations of components that are more or less sensitive to these types of issues. Are there any innovative or unconventional solutions that have been developed to address the problem of excessive play in rear derailleurs, and how effective are these solutions in practice.