*Tesla is going to offer FSD as a subscription in addition to a purchased/owned option.
OT somewhat: Just to add the "moving FSD" is another issue that I also would like to see Tesla allow. But they have decided to treat it more like an optional car part (Analogy: more like a Performance or Premium Package) than a traditional software license.
All of this, the issue with connectivity, whether or not FSD remains with the car or the driver (Tesla strips it from their own resales, so it remains with neither in those cases), or even whether something is a feature or a subscription, just shows how much Tesla is in charge of our vehicles all the time we own them. All of the software elements are at Tesla's mercy, to the point that Tesla could, if it wanted, disable and lock every one of the vehicles on the road. Or, in a more likely scenario, decide to start charging for software updates.
Considering the lopsided nature of this relationship, I think we'd do well to keep watch on what we have and are entitled to at any given time. My post was to inform a small subset of owners -- those with used vehicles ordered in that early time frame, wo bought them privately -- that they have this small entitlement. For now, at least.