CPU Bug "Limited by Main Thread" is causing the bad FPS

When you do get a PhD in tuning FS2020, it turns out a detailed knowledge of which settings affect the cpu and which affect the gpu is a crucial piece of information (I agree the cpu limits the game, but not if your gpu is limiting it first).

My key question is does anyone know of better info than this awesome post by TheOriginalBabu:

The info in it is great (and it surprises me how little it’s used) but I think it was written before it became clear that the need for players (sorry) to tune their CPU usage was going to be widespread.

So any good new post on settings/cpu impact or is TheOriginalBabu the only analysis?