Where there is a will, there is a way. There will always be ways around an air gap. The Iranians had their centrifuges isolated by an air gap. Until someone (c

Where there is a will, there is a way. There will always be ways around an air gap. The Iranians had their centrifuges isolated by an air gap. Until someone (cia? mossad?) dropped USB thumbdrives in the parking lot that contained stuxnet and people being curious plugged them into computers on the air gapped network to see what was on them. Target theoretically had isolated the network that their cash registers where on, but someone mis-configured a VLAN and it was connected to the HVAC network which was vulnerable. I don't think that is an excuse to not do some super cool shit regarding inter-vehicle networking, but you just have to be careful as hell. Based on how horrible most car's entertainment/gps systems are, I'm not sure I put a whole lot of trust in the auto manufacturers to put as much scrutiny on it as they should.