What happened on Mad Men, in a nutshell, the 60s ended, and the 70s began, with all of the “New Age” BS with it.
And Don figures out how to package up 60s idealism to sell crap in the 70s just like how the show started with him packaging 50s idealism to sell crap in the 60s. I like the way the gave characters direction without actually ending their stories, really good way to not wrap things up in a bow and now leave things dangling at the same time. A pretty solid sticking of the landing.