Disk dust mass vs the age of the star. The blue points are the ALMA Herbig sample and the grey points are the four out of six borderline stars (see Sect. 2). The range in dust mass and age of the Lupus and Upper Sco star-forming regions are shown as colored regions, where the gradient indicates the number of disks of a specific dust mass and the thick solid horizontal colored lines show the mean dust masses. The blue horizontal and vertical dashed lines show the respective mean values of the Herbig sample.