Don't listen to or upvote this nerd. The western comprador governments did indeed get ousted by the respective militaries who had and have overwhelming support of their populace. This was an unambiguously positive series events unless you're pro-imperialism and pro-colonialism. Yes, 5 months ago the three countries in alliance chose to withdraw from imperialist-backed ECOWAS (who earlier wanted to invade Niger unless the latter reinstated their former colonial puppet leader) but this is a new development and a great step forward towards African socialism and pan-Africanism. Given the context, it is an even bigger win.
The Rockies are actually relatively recent, 55M to 80M years old. The Appalachians are much older and part of the reason they aren't anywhere near as big as (for example) the Rockies, is because they have been eroded for so much longer. That said, they are still definitely not the oldest mountain range. It looks like the Makhonjwa Mountains win that one.