 The existence of tracking maps depends on the exact type of update considered. By now there is a wide variety of updating policies on plausibility models (van Benthem &amp; Smets 2015), not all of which have obvious probabilistic counterparts. Likewise, for well-known varieties of probabilistic update, such as Jeffrey update, where the probability of selected propositions can be reset at will, plausibility counterparts are not easy to find, though the attempt of van Benthem, Gerbrandy, and Kooi (2009) modifies dynamic-epistemic logic to allow for Jeffrey update and other generalized probabilistic policies.