Speaking of. The Tesla could easily phone home when the air bags deploy... does it? It's all software, so... 6.3?
It does phone home after a car crash. Many people have reported getting a call from Tesla a short while later asking if they're okay and is there anything they can do. However, they don't call 911 for you.
These days its questionable how useful automatic 911 calling is. Almost every car on the road has a cell phone... in most cases someone has called 911 within a minute or two.