My personal experience with the Volvo XC90 is, that it sends the users a notification through the app that they've left a window open or door not completely closed, after locking the car. Can't say a lot more about it: it's just GREAT.
Tesla builds cars. Cars are driven by grown-ups. Often times, grown-ups are part of a family. That family might even include children. More often than not, these children are seated in the passenger row, right behind the driver row.
The current in-car navigation is triggered to charge during a trip if it detects you might not reach your destination. I'm not fully aware of the parameters used, but it seems only average consumption is a factor in trip calculation.
Please add an (optional) head-up display. It is proven that using a head-up display drastically reduces the amount stress on the eyes during longer drives, as it takes away the need to look down and change focus from the road.
Please add an (optional) physical 'kick'-sensor to open the tailgate. When the key fob is detected and the sensor is activated by a kicking move underneath the backside of the car, the tailgate opener/closing mechanism is activated.
On (most) modern European cars, it is default system behavior to (rapidly) blink both brake lights during emergency braking, as to make traffic behind you aware of the intensity/urgency of your action.