It will turn out there isn't a linear relationship between data volumes and successful self driving. There will be a wall somewhere that prevents it from being achieved regardless of data (assuming current AI techniques and hardware available in the foreseeable future). So what will happen is Musk and co will demand that roads be redesigned to accommodate their tech (e.g. cars network and human drivers are banned from major highways).
Maybe, but so far we don't really have any examples of good AI (or even barely working AI like GPT4o) that wasn't trained on massive amounts of data.
Is data enough? Maybe not, there's a lot of progress on RL now that can do wonders without even more data. Is data necessary? No evidence to the contrary, yet.
