If you are stuck in a place that actually requires a car then this makes sense. Between the two you’ll save a ton of money.
In the long term though vehicle to vehicle communication will be required for all cars on the road. You will have (probably property) computer in your car controlling it. Unless you go back to like the 80’s or something you’ll still have a proprietary computer in your car that will need to be replaced.
But even getting a bike for occasional trips prepares you for gas prices spiking or your car breaking down.
They aren’t two completely different problems, they’re in direct opposition. Making cars more tolerable increases demand for cars. Improving mass transit and bike infrastructure decreases demand. One is sustainable, the other is not.