I think consumers will embrace subscription software and cars if they can get them cheaper and get future enhancements thrown in as part of the subscription.
The manufacturers will force you to upgrade by creating features that require more hardware than your current hardware has.
The government could require FSD in future, but I don’t think it will get to that when consumers realize how much safter the roads will be when FSD is embraced by a majority of the consumers, manufacturers will be forced to incorporate the feature.
“Manual driving” is definitely going to be rare in the not too distant future. That includes me. While we all worried about our parents driving when they were “too old”, that won’t be a problem in the future. Either a self driving car or a self driving taxi service will take over. For our grandkids, it will be totally normal.
As for other subscription services, it will be just like credit. Younger people will embrace it, while those more experienced will see it for what it is, a money grab.