ORIGINAL: mikmyk
and?
...and it wasn't like they went out seeking to add Soviet/Russian weapons to their order of battle, like they would with the PAK-FA. Adding the PAK would be a major shift for the South Korean military - all new TTPs, maintenance, training and logistics requirements. Could a PAKFA pilot be reasonably expected to have an Air Force career (which would likely entail eventually transitioning to other more numerous airframes, putting the personnel from PAKFA units at a disadvantage vis-a-vis their peers who have been in F-15/-16 units their entire career).
I'm still not even sure the Russians would seriously offer the aircraft to the ROKs.