Pressure-energy density posterior distributions for the PP (left panel) and CS (right panel) extensions with Bayesian χEFT uncertainties up to 1.5n₀ with pQCD extensions (GP-N³LO, blue regions) and uniformly sampled in the previous N³LO range (N³LO, black dashed lines). The dark (light) blue regions and the inner (outer) black dashed lines encompass the 68% (95%) credible intervals. The vertical thin lines mark the points of 1.5, 2, and 3ε₀ for easier reference.