Reviews of the 7900X3Ds are live now.
Interestingly, TechPowerUp has a review with the cacheless CCD disabled as a preview of the 7800X3Dand that seems a much sweeter deal. No risk of some games scheduling incorrectly to the cacheless core as it happened with the 7900s and a whopping 100W less of power consumption vs. the 13900K, despite matching or outperforming it in most titles.
Seems like the one to get (and likely the reason it was delayed so AMD can cash in with the 7900s?)