Some good news re performance
"Thus, I'm not in a position to speak to the game's scalability across systems, nor about how settings impact performance. Something still needs optimizing on Asobo's end. Curiously, one of my worst and most consistent framerate chugs came from a prebuilt destination in the Balkans that the game encourages players to visit in one of its menus, and I was able to reproduce the issue on multiple PCs. That frame rate hovered in the 12 fps range while inside of the cockpit, whether on the ground or in the air, and closer to 30 fps (albeit quite unsteady) when the camera floated above the plane. Is the current issue due to the in-plane view? The specific number of trees rendered below? Something about the atmospheric systems being simulated? Asobo reps didn't have a good answer as of press time."
"[Update, 4:10pm ET: A Microsoft spokesperson forwarded the following statement to Ars Technica: "Development is now heavily focused on making build optimizations for a variety of PC setups within our recommended specs. We anticipate additional performance improvements to be implemented as we arrive to launch on August 18 and beyond."]"