Sub-Jovian/Neptune desert of exoplanets in the R_P–P and M_P–P parameter spaces (top and bottom panel), colored by the planetary density. In the top panel, the upper boundary is marked by “normal” Jupiters with higher density (>1ρ_J), while in the bottom panel, the population of inflated planets (red points) appear below the normal Jupiters and, thus, the inflated Jupiters mark the actual boundary.