At the same time, some of us don't give a f$*k..
I appreciate that prop blur is nice, but some of us aren't fortunate enough to be close enough to shoot at short focal lengths. Therefore long focal lengths are required and so are shorter shutter speeds.
To base all photograph merit on whether or not a plane has a frozen prop is just stupid.
I shoot from 400mm to 800mm and I strive for prop blur every shot.
To me the difference is do you want an ascetically pleasing pic or do you want to document the plane. If it is for documentation then a static prop is OK. When First started shooting I thought "cool" I can freeze the prop. Now my tastes have changed.