Schematic illustration of the evolutionary pathways of BL (bulgeless, BEARD-like) galaxies versus BD (bulge-dominated) galaxies. BL galaxies generally experience quiet merger histories, sustained growth, and smooth star formation. Although some undergo a major merger after z = 2, these events tend to be coplanar, corotating, and gas-rich, which disrupt but do not destroy their discs. In contrast, BD galaxies assemble earlier, with significant gas accretion and active merger activity occurring primarily before z = 2. Major mergers in BD galaxies show no preferred alignment, contributing to their bulge-dominated morphology.