It has been recognized that, in the general AC theory, the reference state need not be an electronic ground state as long as it is not degenerate. This has motivated the development of AC methods for excited states, which recover the dynamical correlation energy for a specific state. It may be worth exploring if a similar approach could be developed for Kohn-Sham DFT, taking an excited Kohn-Sham determinant as the noninteracting system. The clear advantage over TDDFT would then be the description of states of double-excitation character.