Seems like there was a lot of pressure to get v13 features out with the holiday update, and now that 12.6.1 is out for HW3, Tesla isn't telling us what's coming next or when. Perhaps the FSD team got a week off.
It could be that the next 'big' release will be getting the Cybertruck up to true v13.2.2 speed, with reverse capability, etc.
Aside from the 'coming features' in the release notes, I have no idea what Tesla is working on for the next release, although I assume it has to do with parking.
