After several flights today, I’ve found the above doesn’t always work from the very beginning of the flight, however, moving the MSFS render scale slider from 100 to 130, apply, then back to 100 will get it to become smooth again (and make sure msfs is in foreground), and sometimes toggling aliasing from TAA to OFF to TAA again can fix it
It’s a bit frustrating to have to do this each time, but the smoothness is worth it for me