This is what really matters? A brand new airport? Geez..
I think if you’ve flown into IST anytime in the last 5 years, you’ll understand why they badly need a bigger airport and hence his excitment. If you took all the widebody aircraft out of THY, the airfield would still be too small.
Plus, the pace at which some EU countries approve certain expansions, LHR might get a new taxiway by 2090!