Makes a lot of sense. I did a small dive into watersheds and fluvial systems a long time ago and something that surprises layman is how quickly rivers can change in just a few decades, let alone thousands of years. Even (or perhaps especially ) large rivers love meandering and and carving new paths over time.

Humans think of rivers as static things and like to use rivers as natural "borders" and forget that these are actually organic and evolving systems.