[sakopov]

According to this study from 2005 [1] the Appalachians are eroding 6 meters per 1 million years while the rivers are incising 30-100 meters per same time period. So they're technically still becoming more rugged.

[1] https://web.archive.org/web/20250326213947/https://www.geoti...

[IAmBroom]

Currently.