Something strange that worked for me to greatly reduce stuttering is increasing the render scaling by one notch above your native resolution. FPS impact is negligible but for some reason it seems to greatly help. If anyone can replicate this it would be awesome.
My settings are all ultra with nothing changed and realtime traffic, weather and ATC.
5800X / 3080 / 32gigs of 3200 ram OCd to 3400
FPS between 40 and 55 usually and 30 to 35 at dense places like JFK and LAX.
From the devmode FPS counter, doing this appears to cause the GPU and CPU to work more in tandem (hope that’s the right way to say it). Just want to know if anyone else can replicate this. It’s a counterintuitive move, but has helped me. Of course the A32NX mod completely obliterates any improvements from anything else and we lose 15FPS and stutters become pronounced.