Upper panel: Estimate of the systematic uncertainty in our modelling of the matter power spectrum using CAMB and HMCODE2020, compared to two P(k) emulators BACCO (green) and EUCLIDEMULATOR2 (orange). The figure shows the ratio between the power spectrum from CAMB and HMCODE2020 to those returned by each emulator, evaluated at 10 000 representative samples from the fiducial E_n/B_n posterior with a tenth of a standard-deviation. Lower panel: Constraints on baryonic feedback suppression from KiDS-Legacy. The marginal HPDI of feedback amplitudes from our fiducial E_n/B_n is shown in red, relative to a range of hydrodynamical models of baryonic feedback suppression from FLAMINGO(Schaye et al. 2023).