Tried all of the above, not my first rodeo by any stretch. No similar issues with DCS or X-Plane.
CPU usage sits around 35% on the first 3 cores, locking MSFS to those cores had no effect. GPU usage runs high, but peaks did not coincide with crashes. All temps within normal range. i9 9900 KS, RTX 3090.
Windows event viewer always points to flightsimulator.exe