Stacked barplot showing the distribution of stars based on the comparison between their current median guiding radius (〈R_g〉) and birth radius (〈R_b〉) across various stellar groups, arranged in order of decreasing 〈[Fe/H]〉. The lower segments of the bars, shown in darker shades with right-slanted hatching, represent stars with 〈R_g〉 greater than 〈R_b〉. The middle segments, in medium shades with left-slanted hatching, indicate stars where 〈R_b〉 is less than 〈R_g〉. The top segments, in the lightest shades with vertical hatching, represent stars for which 〈R_g〉 and 〈R_b〉 are consistent within the adopted 2σ_tot threshold. Each group is uniquely coloured according to the scheme used consistently throughout the paper for clarity. Additionally, the percentage of stars with 〈R_g〉 > 〈R_b〉 is displayed at the top of each bar.