Composition (top) and specific entropy (bottom) vs. normalised mass at the time when proto-Jupiter reached its final mass (at 2.6 × 10⁴ (Hot_compact_Z & Hot_extended_Z) and 2.6 × 10⁶ years (Cold_extended_Z & Cold_high_Z). In both figures, thicker lines depict convective regions. For comparison, we also show how the accreted heavy-element profile without mixing (grey dashed) for Hot_extended_Z, as well as composition and entropy from Vazan et al. (2018) (red dotted). The black dash-dotted line depicts roughly current Jupiter’s entropy S ≃ 6.2 k_B baryon⁻¹ (Marley et al. 2007).