As seen in the image below, it is not uncommon to have the sim prompt the player to click “Ready to fly” well before the sim is actually ready for the player. This leads to a relatively poor experience in the often crucial first moments of a flight. In the case of starting cold and dark, it means that the most taxing segment of flight on most systems performance-wise (being on the ground at an airport) are also now impacted by incomplete assets still being downloaded and rendered.
Please modify the logic of the loading process to withhold the “Ready to fly” button until downloads have completed. I think most users would rather a slightly elongated load time and have a better first experience in a flight than the current solution.