Further anecdotal evidence KSFO has taken a performance hit. This looks to be big airports in general but KSFO and KATL keep being mentioned in these beta forums, along with a stutter near big airports in the Series S which up until now had remained stutter free at least in the main, non beta forum discussions.
At this point I am all but convinced the Main Thread in this build, even before TLOD comes into play, isn’t as optimized as it was in SU8, and it certainly is not better optimized. Especially at and around the busiest areas and airports in the world.