Final BH masses as a function of the initial He core mass. The scale in the horizontal direction is logarithmic. The colors in the background indicate the approximate range for each evolutionary path, see also Sect. 3. Right panel: masses inferred from the first ten binary BH mergers detected by LIGO/Virgo, with a red shade to emphasize the overlap between PPI and CC, and green and blue hatches to indicate the fate of the progenitor in different BH mass ranges.