Microsoft Flight Simulator 2024 Requires Fraction Of Storage Space Versus Last Game
Briefly

The very important thing is overall bandwidth consumption is way down, because you only download what you really see when you see it, and we don't pre-download at like hundreds of gigabytes.
Now we integrated everything into the cloud, and it is all streamed and kept into a rolling cache on the hardware. You don't have to install any new World Updates; they're just streamed seamlessly.
Read at GameSpot
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