TSM versus planet radius for hot (800 K < T_eq < 1750 K) large sub-Neptunes (2.75 < R_p < 4.0 R_⊕). TOI-3493 b is the second-most promising sub-Neptune along with three others (all marked in green) for transmission spectroscopy studies in the given temperature range and with mass measurement precisions exceeding 5σ discussed in the text. Data come from Hord et al. (2024). The names of the confirmed planets with mass measurements >5σ are in green.