Age (left) and mass (right) CDFs for the surviving OCs, no mass cuts imposed, in one realization of our synthetic population. We compare these distributions to the observations of all OCs within 1 kpc from the E. L. Hunt & S. Reffert (2024) and D. Almeida et al. (2025) catalogs with at least a mass of 230 M_⊙ (marked by the dashed vertical line on the right panel) where observations are expected to be complete. The blue dashed line shows our synthetic extant OC distributions using t_dis,O, and the solid blue line shows these distributions using ﹩{t}_{{\rm{dis}},{\rm{sim}}}﹩.