Kind of annoying that they are holding the 7800X3D back, but I will likely wait for it. For a gaming system more than 8 cores rarely matters, and I already have other 16 core systems for productivity tasks. I feel a single CCD is also more reliable for gaming. Although two CCDs works fine most of the time there is still the odd game that migrates threads between the CPUs resulting in lost or inconsistent performance, and that would be especially bad with the X3D versions. But we'll see what the reviews show. Maybe it won't be an issue.
With that being said the 7900X3D is kind of iffy for me because you only have six X3D cores. Six cores is generally enough for gaming now, but four cores (with not SMT) was also enough for gaming for a long time up until it suddenly wasn't. My i5 2500K was a great buy, but my i5 7600K definitely was not.