Same as Fig. 5, but with additional lines included to demonstrate the impact of the assumption regarding the slope of the low-mass end of the GSMF. At z ≲ 2 the ratio is not affected by this assumption. At z ≳ 3, the difference becomes apparent – if the slope of the low-mass end of the GSMF is fixed (as in the cases shown in Fig. 5), the trend flattens and the ratio remains at the level reached at z ∼ 3. If the slope steepens with redshift, the ratio for the stars in the intermediate-mass WD and NS progenitor mass range starts to increase with z.