I have mixed feelings on this. On one hand the idea of subscriptions for components that are physically present in the car and don't require ongoing cost by the manufacturer to support them is annoying. On the other hand I think that there could be some advantages to that model. The costs of cars seem to going up considerably because of all the advanced features. If it is possible to standardize some of the manufacturing process to reduce cost and control access to items with software that could be a win. It would also be nice to have the ability to try features out in your real live before deciding if you want them. Or it could allow drivers to add features for short periods of time. It might not make sense to buy heated seats if you live in Florida, but are travelling to Colorado for a ski vacation paying $10 to unlock if for a month might an awesome feature.

I think the middle ground would be to require manufacturers to offer a lifetime unlock option for any feature that could be subscribed to without an ongoing maintenance cost.