The split has already happened (Score 1)

The split has already happened. It's just hard to see right now because the two branches are not sufficiently differenciated ,and nobody cares. It will become obvious in 100,000 years or a lot less (more like 10,000 or so). Those alive at the time would not care and it will be too late to do anything about it. It's a bit sad that we can speculate about it but there is no proof.