Properties of the protoplanetary disks of the synthetic system analogues for the HIP 29442 system (coloured lines) compared to the distributions they were sampled from (turquoise curves, as specified by Emsenhuber et al. 2021b). The dotted lines show the one- and two-sigma error intervals of the plotted distributions. The bottom row shows the distributions of the same disk properties for the single-planet analogues for planets b (green), c (pink), and d (purple). Left: initial values of the gas disk masses with a probability density function fitted to Tychoniec et al. (2018). Middle left: disk metallicities indicative of the disks’ dust-to-gas ratios, sampled from Santos et al. (2005). The red point indicates the observationally derived metallicity of HIP 29442. Middle right: initial values of the solid disk masses, calculated from the sampled gas disk masses and dust-to-gas ratios and compared to the initial solid disk masses of all systems in the synthetic NGPPS population. Right: disk lifetimes of the synthetic system analogues compared to the distribution of lifetimes calculated from the fraction of observed stars with disks at each age (Mamajek 2009, black curve) and the lifetimes of disks in the synthetic NGPPS population (turquoise).