The galaxy JADES-GS-z14-0, spectroscopically confirmed at z ≈ 14.18, already shows clear [O III] emission implying substantial oxygen enrichment and a chemically evolved interstellar medium when the universe was <300 Myr old in the standard ΛCDM picture (Carniani et al. 2024; Parlanti et al. 2025). In ΛCDM this level of metal enrichment so early requires several rapid generations of massive stars and efficient retention of their ejecta in a very short time, pushing chemical evolution models and suggesting that early galaxy formation, feedback, and enrichment proceeded faster and more efficiently than many pre-JWST simulations predicted (Madau & Dickinson 2014; Carniani et al. 2025).