Alamofire 4 to 5 Migrations: Experiences Wanted!

Now that the Advanced Documentation has been updated, the last bit of documentation needed before the 5.0 release is the Alamofire 4 to 5 migration guide. While parts of this will be extensive due to renames and changed functionality, I'd like to gather community input from those who have already made such a migration. You can see our Alamofire 4 migration guide here.