I also reset(deleted) my WASM and the plane loaded back up in incredibly quick. Like within a minute. Exited the sim, then came back in and loaded the plane up and it was completely disappeared.... So I once again deleted the WASM and load the sim back up and the WASM loaded up incredibly quick once again.
Landing was a real chore. The stutters and tears were really bad. Did not have this problem with the launch. After slowing down below 60kts and exiting runway the frames smoothed out again.
I experienced similar departing and enroute after 2-3 hours get massive stutters and frame drops when panning at cruise altitude. Currently descending into KDTW from KLAX and panning in cockpit is a chore. I have a AMD 9 7900X with 64GB of ram and a 4080RTX.