Look, IST was/is seemingly a disaster for Skyteam. It was the second place with a Skyteam lounge after LHR and at its peak there were believe it or not up to 25 Skyteam flights a day!
Peak:
Aeroflot: 2 [] 2
Air France: 4 (5 at the very peak with that weird short lived Toulouse flight) [] 1 per day, add a half for the AF pax on the Atlas flights
Alitalia: 4 [] 0
China Southern: 1 [] 0
Czech Airlines:1 [] 0
Delta Airlines: 1 [] 0
Kenya Airlines: 1 [] 0 -although in fairness IIRC that route ended just before the lounge opened.
KLM: 3 [] 1
Korean Air: 1 [] 1
MEA: 2 [] 1
Saudia: 4 [] Probably 4 or 5 Saudia has a bunch of weird ones coming and going and on different days besides Riyadh and Jeddah, so they are possibly the only ones that have increased.
Tarom: 1-2 [] 1-2
So from as many as 25-26 a day down to maybe 12 on a good day.
Now with Joon, watch them close the Skyteam lounge and use a contract lounge................