You said that they update the AP NN(s) with every weekly version increase. I don’t think you could know that. I suspect they have a validation process that updated models go through, and that they choose to submit an updated one to their development repo when they have one ready which passes. They could also choose to do this in a revision in the release branch.
My point was it’s reasonably to say that any update might have AP / NN updates, and that new major versions are more likely to, but there’s probably no 1:1 relationship between models and weeks/versions as you suggested.
OK... but I do.
The way it actually works is like this: (I am using YOU as an example so please use common sense)
You are driving a Tesla Model 3 in Autopilot. Your car has curb detection running in shadow mode. It is also collecting images of cars with trailers on 2 lane highways in the background. And at a specific turn you override Autopilot because your not happy with the distance between you and another car.
Now all of that data gets sent to Tesla.
Tesla's AP engineers will first run validations on all of that data. First to see if the AP intervention was due to a problem or bad driving habits and secondly to see if the corrective measures taken improve safety or if there was a better way to handle the scenario.
They also parse any data gleaned from the shadow mode operations or special requests.
Once validations are complete, the data goes in to an internal build where it is further validated in an actual vehicle. This is done first by employees, then by beta testers. From there the build is tweaked until the revision (the .x at the end of the build number) gets final validation and is released to a limited group, then the masses.
Now if you were the only driver on the road, I could see this sort of update happening once or twice a year. But tens of thousands if not more hours of data are being validated at a time and the validation process never stops so every week there is new data that is ready to be submitted to a build.
THAT IS HOW IT WORKS!
Major releases such as the change from V9 to V10 add major improvements and features. Like GUI Improvements, Text Messaging, Advanced Summon... Those happen once.. maybe twice a year. More likely just once a year though.
