My reading was that the “identical ancestors point" is the point at which every person is either: 1. an ancestor of all currently living people; or 2. an ancest

My reading was that the “identical ancestors point" is the point at which every person is either: 1. an ancestor of all currently living people; or 2. an ancestor of no one currently living (ie their line died out). Alternatively, it’s the time when all currently living humans have exactly the same set of ancestors. Whereas “most recent common ancestor” means that the intersection of ancestries of all living people is non-empty. (That intersection being the common ancestor)