Orbital evolution of the planet MASCARA-3 A b, shown as an illustrative example of our modelling outcome. Each line in the panels corresponds to one of the 100 realisations used for this system. Colours indicate evolutionary regimes: red, brown, and blue show M_crit, P, and Q′_WB, respectively, during phases with active wave breaking. Grey denotes radiative cores where the wave-breaking criterion is not fulfilled. Black marks convective-core phases. The black dotted and dash-dotted vertical lines indicate the positions of the intermediateage main sequence (IAMS; EEP 353) and terminal-age main sequence (TAMS; EEP 454), respectively. The planet’s mass is shown as a purple dashed line in the top two panels. Orange solid and dashed lines trace the tracks ending in the median and 1σ ranges of the age or EEP of destruction. Orange circles mark the starting points of these tracks, while orange crosses denote the moment of planetary destruction.