@MarkS
But the "scenery at altitude" topic is interesting and also something I'm deeply considering during my longer tours, might depend on the settings (for me mostly HIGH and 170 LOD) and with this:
~4000 AGL - You see all of the objects, trees and the subtle changes in the topography, best experience.
~8000-15000 AGL - Good for very low detail areas like some of the Amazonas or South Africa where the textures are hideous or missing when too near.
15K-25K - A strange area where MSFS already starts loading lower quality/mid-height textures, but you are close enough to see the imperfections.
over 25K the textures are lower quality, but you are far enough for them to actually start look good. As a downside everything is getting more blueish, which is accurate but makes the terrain look less nice + bigger chance of having it covered up by cloud layers.