I flew into ICN yesterday early evening and noticed that KE was using all the gates on their half of the main terminal, half of the OZ pier, and two gates at the concourse terminal had KE planes parked at them. When I departed ICN about the same time last week, I noticed then a KE plane also at the concourse terminal. Is KE now so maxed out at the main terminal that they now need to sometimes use the concourse terminal? That time of the evening is not normal for me to arrive or depart, so maybe it's always been like this and I just never saw it. Definitely later in the evening I've never seen all the normal KE gates, plus some being used.