Evolution of the disk mass. Top panel: theoretical mass within the centrifugal region. Second panel: theoretical dust mass within the centrifugal disk, neglecting the innermost five au region. Third panel: Dust mass obtained from PRODIMO synthetic observations. Last two panels: synthetic CO line flux as a proxy for the disk gas content. The dust masses are calculated from continuum Band 6 fluxes, while the ¹³CO and C¹⁸O line fluxes are calculated at 150 pc. The vertical, dashed gray lines mark the average Class 0/I and Class I/II boundaries. The shaded regions on the right depict half-violin plots of dust masses (red) and line fluxes (blue) in Class II disks, as observed in a subset of ALMA surveys. The vertical, dashed gray lines mark the average Class 0/I and Class I/II boundaries.