Unless Winternight pulled a shell game on the Corporate Court, Friday is dead, as of Artifacts Unbound. On live TV, no less.
As for the world tree in the Resonance Realms, I'll just say two things:
1) Deus awoke to a feeling of betrayal, with a sword hanging over his head, so to speak. Everything he did in the Shutdown, and after, was to not only escape and survive, but to ensure that no one could ever put him in a position like that again. Once someone loses their raison d' etre, their reason for being, what do they do then?
2) When Crash 2.0 hit, Deus was in the middle of trying to make himself a god in the Matrix. What is there to say he didn't ascend somehow into the Realms? There are still many unanswered questions from the Crash, even a decade later.