But if it's a documented API with open-source 'reference' app, everyone can make new versions, enhancements, etc. And for sure, assuming a popular standard phy

But if it's a documented API with open-source 'reference' app, everyone can make new versions, enhancements, etc. And for sure, assuming a popular standard physical/radio interface is used now, it will still be supported, either through backwards-compatibility in the standard, or with gateway dongles etc, far into the future. I have no confidence you'll be able to get a replacement screen or computer mainboard etc for any car you buy today, in 12 years, and almost certainly not in 20,30, etc.