In this final chapter, we conclude by surveying a few additional settings not covered by the models defined in Chap.  2 , but strongly related. Indeed, so far we have allowed general update families and, in Chap.  7 , non-equilibrium initial conditions. However, we have restricted our attention to the equilibrium measure \(\mu \) being product, constraints being identical at all sites, dynamics changing the state of a single site at a time, the underlying graph being a d-dimensional lattice. Each of these hypotheses may be revoked and leads to interesting models and questions, many of which have not yet been explored.