perhaps not a problem in green countries like Canada
Tankengine,
I've flown off several quite dusty strips in Canada and that's just in the south. I've never been anywhere near the gravel strips in the north, which can be very dusty in the summer:
This 737 has the "unpaved strip kit" - the most visible parts of which are the gravel deflectors on the nose and main gear, and the vortex dissipator probes under the nacelle leading edges.