Disk categories across stellar and disk properties. Top: stellar mass versus age. The dashed lines delimit the Taurus age (1–3 Myr; Luhman 2023). Middle: FIR versus NIR excess, shown in fraction of the stellar luminosity. The dashed lines indicate the ideal separation between low and high excesses. Bottom: polarized light contrast versus disk dust mass. The dashed line indicates the detection limit from Garufi et al. (2022).