Unless there is legislation to prevent it we will reach a point where at the very least private insurance companies will have access to this data, provided they are willing to buy it. In an even worse scenario we'll have courts and law enforcement with access to this as well.
I can see a safety-related argument that you may need to briefly accelerate to get out of a sticky situation. I cannnot see a safety-related argument wihch says BuyMyBitcoins needs to be allowed to drive 10mph or 20mph above the posted limit for an extended duration of time.
I expect ISA in active/enforcing mode is coming, and it's just a question of whether new cars have it in 5 years or in 30 years.
If speed limits were set to the natural safe speed the road was designed for people would be far less cynical about these things.
Here’s where I think you’ll disagree with me the most. Speeding is bad but it doesn’t warrant having some big brother system to keep track of everytime someone has ever gone 10-20 over. People die because of speeders, yes, but not enough to warrant this kind of surveillance.
We still have other ways of enforcing speed limits and enhancing public safety on the roads.