First example: Takeoff loading at El Prat / Barcelona, notice several dips in FPS and generally low FPS.
Second example: Relatively slow speed flight over Chicago, FPS very much up struggling.
Third example: Compared to above, similar kind of plane/speed, but even denser urban area (Barcelona) but better performance.
Fourth example: Same as above but high speed fighter jet and performance is stable/good. It was worse just after takeoff, even before the urban area had loaded.
Fifth exampe: Also over Barcelona in a jet but for some reason much worse than above.
In general, performance seems to drop whenever I pan the camera around or make sharp turns. Tested also in rainy thunderstorm weather over Barcelona but didn’t notice any significant drops compared to clear/sunny weather.