The Sybils' Advice on Charm (and $\tau$ Leptons)

The importance of future studies of charm and $\tau$ decays is emphasized as probes of New Physics: the most powerful tools are \cp asymmetries in charm and $\tau$ decays both in partial widths and final state distributions. While these searches for \cp violation are instrumentalized in the search for and hopefully future analysis of New Physics, they might also shed light on the \cp breaking dynamics required to implement baryogenesis. $e^{+}{e}^{-}$ Super-Flavour Factories are optimally suited for the challenge, in many aspects even uniquely so.