Modified wind momentum as function of luminosity for samples of SMC (this work), LMC (Hawcroft et al. 2024a, Brands et al., in prep.), and Galactic stars (Hawcroft et al. 2021). The dotted lines indicate the linear fits to each subsample, and the shaded regions show their 1σ uncertainties. The points with a red border represent unreliable fits that are likely not representative of their physical properties; these are not included in the fit.