Evolution of M_dust/M_⋆ as a function of sSFR (left) and Z_gas (right) modelled with the state-of-the-art cosmological simulation SIMBA (Davé et al. 2019, blue lines) and the chemical evolution model of Nanni et al. (2020, light and dark violet lines). In the panels, darker (lighter) curves related to the N20 model are simulations that include (exclude) dust grain growth in the ISM. These simulation runs include different values of ML factors and grain condensation efficiencies, as indicated in the legend. The solid blue line shows the SIMBA model prediction that is the result of the flagship run (100 Mpc h⁻¹ box), which includes ISM dust growth on metals and all feedback variants. In the right panel, along with the median trend for all selected dusty QGs in SIMBA, we also display average tracks for QGs with different δ_DGR (dashed blue line for δ_DGR < 1/100 and dotted-dashed blue line for 1/100 < δ_DGR < 1/2000). Data from this work (contributing to the ∼90% completeness) are displayed as binned 2D histograms, with the colour bar showing the number of observed QGs in each cell.