A little bit but I've been to them a few times and I can still recognise dunes from over 8 years ago. But it's a fair point. Not sure how practical.
Dune Dusters course was shortened nearly 2km due to shifting dunes so maybe some change more than others
with LIDAR-equipped drones it is probably getting close to the time when a map of dune systems (especially without too much vegetation) could be prepared specifically for an event, rather than having to use basemap data that is a few years old.
The technology exists, but the cost will have to come down a bit for routine use for o-maps.
Apparently for WMOC in NZ, final mapping of the big coastal dunes and sandblows was left until the month beforehand because they do shift...