Low gas should come in a monthly report you can pickup it up on your way walking your empty car home. Or a door is open report that you can receive as you lay on the side of the road.
There's some kind of corollary to Zewinski's Law of Software Envelopment: device developers are incentivized to "innovate" their product to the point it can send email.
I have a 2012 Mini with no connectivity at all that has tire pressure warnings.
Yes, it shows on the dash and in the monthly reports.
Soon the car will just purchase its own new tires, or drive itself around town in search of a working air pump.
Or it will just auto-dial the nearest tow service and leave the bill to you.
And it will also pay for it with the money it earned from offering rides to people. :-)