 Even granting that this regularity relationist understanding of the dynamical approach goes through, three outstanding issues for the dynamical approach deserve to be mentioned. First: given that the proponent of the view seeks to excise metrical (more generally: geometrical) spacetime structure, one might ask: why stop there? Is there not something unnatural about excising fixed metric structure, while taking topological structure to be primitive? Such a concern was raised by Norton (2008), to which two responses have been offered in the literature: (I) In direct response to Norton, Pooley points out that “the project was to reduce chronogeometric facts to symmetries, not to recover the entire spatiotemporal nature of the world from no spatiotemporal assumptions whatsoever” (2013, p. 57). (II) Menon (2019) has argued that the machinery of ‘algebraic fields’ can be deployed in order to reduce topological structure to facts about matter, thereby, if successful, meeting Norton’s challenge head-on. Second: how is one to extend the dynamical approach, understood as a form of Huggett’s regularity relationism, to theories of dynamical space-time such as GTR? Here, the lack of spacetime symmetries in the theory has posed problems for the successful implementation of any such account (Stevens 2014), although arguably initial progress in this regard has been made by Vassallo and Esfeld (2016). Third: to which symmetries of the laws is the dynamical approach supposed to be sensitive? In the philosophy of physics, it is common to draw a distinction between ‘internal’ and ‘external’ symmetries: examples of the former include U(1) gauge transformations in electromagnetism; examples of the latter are coordinate transformations, such as Galilean boosts in Newtonian mechanics. But there are many questions here, such as: (i) how, precisely, is the distinction between internal and external symmetries to be drawn? (ii) why should the proponent of the dynamical approach stop at external symmetries? For discussion of these questions, see (Dewar 2020).