 Exotic models such as these might seem redundant, especially since they have been shown to be polynomially equivalent to the standard circuit model in terms of computational complexity (Raussendorf, Browne, and Briegel 2003). Their merit, however, lies in the foundational lessons they drive home: with these models the separation between the classical (i.e., the calculation of the next measurement-basis) and quantum (i.e., measurements on the entangled qubits) parts of the computation becomes evident, hence it may be easier to pinpoint the quantum resources that are responsible for the putative “speed-up”.