I've been few times on tests on Mexican roads, some were actual rally stages, some used in the past or roads next to stages. On most of them you can drive few days with few 4wd cars, 10 hours per day and road is not getting much worse, no ruts, etc.
2017 WRC cars are making much more damage to the roads comparing to 2016 cars, can't compare it to R5 even.
End of topic from me, this forum starts to be waste of time.