Conversely, the link between evolution and the physics of disordered media can stimulate new work in physics and mathematics. As already mentioned, the generator of selection-diffusion dynamics is not always Hermitian (it is not in Eigen's model). This suggests that some of the results usually derived for random Schrödinger operators could be investigated for more general classes classes of operators, along the lines of e.g. Ref. \cite{Altenberg_2012}.