Driveways are likely considered acceptable to be mapped, so they should not be deleted if already mapped by others unless they have been demolished. Others may find these useful data.

They are visible to the public from the street and visible on aerial imagery.

Personally I find them useful for pedestrian routing and analysis, since driveways create a hazard for pedestrians so having them mapped allows for analysis looking at the safety of walking routes.

They also help with routing as they provide hints about where a house may be accessed from the street.

As such I've reverted this change to restore the driveways.