Moving this discussion here because it doesn’t belong in the DLSS thread.
Do you have a source on this? I don’t recall Asobo ever saying they switched to AMD’s rendering techniques. They have actually strongly hinted that things like the ray-marched reflections are their own in-house technology.
And then there’s AMD’s official website which clearly states MSFS is exclusively using CAS, and no other FidelityFX solutions.
That would be RSR, and as you said, it will be limited to GPUs based on RDNA and newer. Considering that external solutions (like RSR and Magpie) come with an additional performance overhead, and also upscale the UI and menus instead of the 3D image only (which badly affects readability at lower resolutions), they do not help those of us with older GPUs much. A native solution is required.