Since the original GameSpy matchmaking service is defunct, FSX: SE uses Steam's multiplayer infrastructure to restore online flight capabilities.
Features over 24,000 airports and a "living world" with dynamic weather, AI ground traffic, and animals. microsoft-flight-simulator-x-steam-edition
The recompile addresses several legacy crashes and memory management issues, making it more reliable for long-haul virtual flights. Since the original GameSpy matchmaking service is defunct,