Several low energy observables such as the muon g-2, the proton radius or parity-violating electron scattering are pushing the intensity frontier of particle physics, demanding precise control of the scattering processes behind them. McMule is a Monte Carlo framework built to meet this challenge. By combining automated tools with effective field theory techniques, it delivers NNLO predictions in QED and has recently been extended to systematically include electroweak and non-perturbative effects. This makes McMule a powerful tool for the most ambitious precision experiments at lepton facilities, such as KEK. I will highlight our biggest challenges, the underlying methods, and the path forward.