I pay $9 monthly now for the optional, more advanced GPS, music streaming and whatever else. Will there be more options and/or mandatory subscription based functionality going forward? Could be. My Microsoft Office 365 subscription is an example and I find it great as I can access my information from multiple devices and it is automatically backed up.TSLA, like almost major technology providers have or are surely moving to a mandatory monthly subscription or the like to use their products and or services. TSLA is a technology company and will be following suit.
Aren't you assuming that subscriptions are necessarily bad? If customers don't like a product, they can hopefully change to another.
Respectfully, I'm still struggling with your point. In my experience, and I believe yours, tech is an enabler. If it isn't beneficial, is likely to be replaced with something better or simply die. And everything has a product life cycle, so there's that.