Measuring developer productivity requires considering the specific goals of the team and project, as well as understanding what matters to both the engineering teams and the organization. Contextualizing metrics is key, rather than relying on a one-size-fits-all approach. Developer experience, happiness, and productivity are intertwined concepts that should be measured in conjunction with quantitative metrics like DORA or SPACE. It's essential to stop measuring when it no longer provides value, as over-metrics can lead to confusion and inefficiency. Additionally, tying metrics to dollars and presenting the impact on business results can help make developer experience a priority for leadership. However, measuring individual developers' productivity can be misleading, and focusing solely on metrics without considering culture and satisfaction can also be counterproductive, leading to a focus on widget-like output rather than people-centric outcomes.