Redshift dependence of the function 2 [μ(z,k)−1] + [η(z,k)−1], defined in Eqs. (46) and (47), which corresponds to the maximum degeneracy line identified within the 2 dimensional posterior distributions. This combination shows the strongest allowed tension with ΛCDM. The left panel refers to the DE-related case while the right panel refers to the time-related evolution (see Sect. 5.2.2). In both panels, no scale dependence is considered. The coloured areas show the regions containing 68% and 95% of the models. In the labels, Planck stands for Planck TT+lowP.