Common sense that in hundreds of millions of years there should have been canyons cut and cliffs formed and buttes, but those have only been formed in the present, at least as exhibited in the GC-GS area and Monument Valley. I'm sure the same is true all over the world.
As of right now the majority of the area of the earth is not eroding.
3/4 is under the sea and sediments are building up.
About another 1/5 of a percent is under lakes.
Large areas are plains with high ground surrounding them and subject to little net erosion.
At any given time on an "active planet" large areas are not eroding and will not be eroding for millions of years.