Complementary cumulative distributions of the final inner binary semi-major axes a_in, for all categories (colour-coded in the legend), and for both Pops. A (solid lines) and B (dashed lines). Merged DWDs all resides in orbits smaller than 1R⊙ (vertical grey line) and few of the Magrathea hosts as well. These parameters refer to the last valid simulation step in secular approximation.