Gaia vbroad histograms of the δ Scuti pulsators (red) and nondetections (gray) binned by age, with the youngest stars on top. The red and gray dashed lines show the mean distributions for the δ Scuti pulsators and nondetections, respectively. These histograms only include stars within the empirical bounds of the instability strip from S. J. Murphy et al. (2019).