Looking at how MFS2020 is working on my machine, I can see I have a serious case of ground texture graphics issues. With all my addons now removed from the Community folder so that there is no addon forcing its textures into the base load, I still have airport ground textures looking like I am in a jungle setting, with rough Bing views of airports or any ground textures overriding "High End" config settings the install set. When I can resolve this, I will reinstall addon sceneries.
Looking on the MFS forums, I received a comment saying "my issue" is known by Asobo..
He stated, "Ground textures, such as various pavements (several types), concrete (several types), etc., from add-ons will effect the global MSFS textures. Add-ons take priority over the default. For example: You install an airport addon for 1 airport. If that one airport has a texture that is used in MSFS default, all airports that use that default texture will be overridden by that add-on texture."
My view of YSSY after all sceneries removed from the community folder seems to say, in my case, the dodgy ground textures remain, despite removal off addon sceneries.
Maybe the only resolution is for a reinstall?? Sounds a dreadful solution due to the download size will take me several days. For me, MFS offers great scenery and sloping runways. I think I will give up on MFS for the next several months and return to the stability of now very dated P3Dv4.5