Evolution of the AGN Eddington fraction f_Edd for the ‘EddLim’ (dotted blue) and the ‘sEdd’ (solid orange) simulations over 8 Myr. Powerful and instantaneous super-Eddington episodes lead to sharp drops in f_Edd, reducing the AGN feedback energy injected overall. Solid and dashed horizontal lines indicate f_Edd = 1 and 0.01 respectively, that mark the separations between the different modes of accretion: super-Eddington, quasar, and radio modes (from high to low rates).