Grippens are based in the south. F-16s are out of RTAF Korat. Seen them over lower Buriram regularly. Those F-16s, block 15?, are out of date and are due to be replaced by Grippen 'E's. Selected in 2024 but not sure if the order has been placed. A lot cheaper than latest F-16 block 70 and far easier and cheaper to maintain.