As far as I know geography, yes, the landscape change is the plain even now. Lithospheric slabs are constantly in motion, which leads to a change in the landscape. Of course, this can pass imperceptibly and for a long time.
And the rapid change in the landscape occurs due to people, because they either dig, then close, then throw mountains.
Inside the earth are lithospheric plates that ensure the stability of the earth’s surface. Lithospheric slabs move, but in the zones the plains move very slowly. And yet the plains change their position.
On the territory of the Russian Federation there are two large plains of the East European and West Siberian. The impact of external forces and internal inside the Earth leads to a change in the plain.