There have been two lines of development at Tesla, one which emphasizes the car's infotainment features and one which emphasizes the autonomy software. Each one regularly adds features to their area of functionality and then occasionally takes a snapshot of what the other is doing. So the infotainment line has all the latest features that are accessed from the screen but lags in autonomy features while the autonomy line has all the latest autonomy features but lags in infotainment features. The infotainment line is the one that the vast majority of cars receive. The people who own the FSD product are the ones who get the autonomy software.
It used to be that the infotainment line didn't have any of the autonomy stuff that was being developed. But the autonomy stuff was getting pretty stable, so Tesla started this snapshotting process to get some of the latest autonomy software into all cars. That made it possible for people who wanted to subscribe to the FSD product to get access to the experimental autonomy features.
Now Tesla is completely revamping the autonomy software, and I expect a period of time where it is going to be considered highly experimental again. To me, that means that the two lines of software will be kept away from each other for a while. The people who own FSD will eventually get to try out the revamped autonomy software, and they'll go back to being guinea pigs.
Tesla is remarkably nimble when it comes to changing plans, but it can be a challenge as a customer to keep up with it all.