What methods do seasoned Zwift racers use to track their progress over time, and how do they incorporate data from sources such as ZwiftPower, Strava, and Training Peaks to gain a more comprehensive understanding of their performance? Are there any specific metrics or key performance indicators that are widely considered to be more important than others in evaluating progress, and how do racers use these metrics to adjust their training strategies and tactics? How do Zwift racers use tools such as Zwifts built-in analytics and third-party plugins to get a more detailed picture of their progress, and what are some of the most popular and effective tools being used in the Zwift racing community?