I have gotten rid of my car because Uber/Lyft and public transport/biking are SO much cheaper than owning a car. On the order of a few hundred dollars a month (if I had gotten a new car and insurance).
Additionally, I don't spend time parking or with car maintenance nor do I worry about speeding. In addition, I have more time to make or take phone calls on the road, do some light work on a laptop (with a mobile hotspot) or if I'm feeling tired, just nap.
Despite initial concerns, Ubering and Lyfting is simpler, faster, easier and far, far less stressful than driving. This only compounds for longer trips. There is nothing like an hour-long Uber ride where you basically take a nap and wake up when you've reached your destination or just calmly listening to a podcast or watching an online lecture and being able to take notes.
Now, that said, I'm becoming an avid outdoors person and I want a vehicle I can take on trips that can stow my gear. I use a car rental service for this (currently Turo) and that works well but, I wish there was a service that let me borrow my friends' cars but, got a daily insurance rider so that their asset would never be at risk and that I would be in compliance with the law in California that requires all drivers to have insurance. Something like what Google's ridesharing is doing but, for car borrowing.
Put a per-mile fee on there based on IRS mileage, slap a $5 per rental fee for putting all of this together and boom, you have something that would really revolutionize things.