Thoughts on Owning a Self-Driving Tesla

My Subaru was showing its years so I recently bought a Tesla. My thinking was I can buy a car or I can buy a car+driver for the same price. Simple choice. I’ve driven about 2000 miles including one long trip (6 hours) to North Carolina and back.

FSD is incredible. I don’t mind driving but about 95% of the miles on my Tesla have been FSD. You might wonder why bother with FSD when you still have to supervise but supervising is easier and more pleasant than driving. I was in Washington, DC one evening and I needed to go to an address I was not familiar with. I could have gotten there but it would have required going back and forth between the road and the map, and DC can be confusing–do I drive straight under the mini-underpass or is this the one where I drive over the pass (DC drivers will understand). Instead, FSD drove me at night, flawlessly.

FSD uses 8 cameras to build a 3D, bird’s eye view of the car and everything around it, so it sees in all directions at once. It picks out every car, pedestrian and cyclist and predicts where each is going, much as an LLM predicts the next word. Then it predicts the best move a good driver would make, and makes it. All of this runs on one big neural network, trained on data from billions of miles of Tesla fleet driving. The ride is smooth. Since ChatGPT launched, FSD has improved about as much as LLMs have, and for the same reasons.

Supervision is needed, in my experience, mostly due to navigation. It gets a bit confused on the HOV and normal lanes on I-66 (as does Google Maps). It stopped perfectly, however, for a school bus and even for a police officer who stopped traffic by standing in the middle of the street.

Another example of how supervising is much less taxing than driving. I was listening to Tyler talk with Gita Gopinath on my way home from North Carolina. It’s a great conversation but full-on PhD mode and I became a little lost trying to remember my international econ. No problem, just ask Grok. I had a whole conversation with Grok, reviewed Mundell-Fleming, reminded myself of the great Alan Stockman model (the only international econ model that makes sense) and then returned to the podcast. I could not have done that while driving.

Grok is a significant benefit. Essentially, Grok runs the car’s controls the way it might run your computer, and you just talk to Grok. It’s a more seamless interaction than talking with the car directly. I can even review (verbally) email and send emails as I drive. If you also use Grok Bot you have the bot book an appointment at a dentist or start working on your PowerPoint slides. FSD is $99 a month and the premium connectivity needed for Grok is $10 a month (Grok Bot a bit extra). FSD plus Grok is about what I am saving on gas, so it’s roughly a wash.

My colleague, who long held that self-driving would be worthwhile only if he could sleep, was amazed at the experience of driving my Tesla and immediately ordered two.

It was also pretty cool when I “summoned” the Tesla from the nearby parking lot and we watched it drive itself to us. You might wonder, by the way, how all this innovation is possible. Maxwell Tabarrok, writes about a key part of the answer:

The Department of Transportation (DOT) sets strict safety requirements for cars, but manufacturers are allowed to release new designs without first getting the DOT to sign off that all the requirements have been satisfied. The law is enforced ex post, and the government will impose recalls and fines when manufacturers fail to follow the law. The FAA, by contrast, enforces all of its safety rules ex ante. Before aircraft manufacturers can do anything with a design, they have to get the FAA’s signoff, which can take more than a decade.

(By the way, it’s amusing to re-read Max’s post in light of Tesla’s flying car.)

If you do enjoy driving, the Tesla is fun, with sports-car acceleration and great responsiveness.

What about range anxiety? If you run out of electrons, the car is dead and no one is going to bring you a portable battery to get you to the nearest charging station. You must be carried–carried on a flatbed, not towed! (Moreover, if you leave the car unplugged for weeks the low-voltage battery can die, in which case you can’t even open the frunk without a special jump start.) You don’t want to run out.

It works fine, however, if you adjust behavior. In a gas car you drive until you are low on fuel and then assume you will find a gas station. If you try this with an electric car, you will be anxious. Tesla chargers are quite common but they are often in odd places like behind a restaurant. There is no big T sign out front. So what do you do? The Tesla knows where the chargers are so put your final destination into navigation, switch on self-driving, and then, if needed, the Tesla will find the nearest charger along your route and drive you there and even back you in nicely. Thus, you trust the Tesla system–car plus network–not just the car. This works much better than with any other electric car.

Normal range for the Model Y is about 250 highway miles on an 80% charge. This is less restrictive than it appears because in many cases you don’t need to charge to full. Returning from North Carolina, for example, I was projected to arrive home with 2% charge–a bit too close for comfort. So the Tesla stopped and charged for 5 minutes (no slower than a gas stop) and I arrived home with 18% charge. I then charged to full overnight. Being able to charge at home is a big advantage (~$1500 to add a charger). Overall, driving the Tesla long distances you will have more frequent stops but unless you are driving cross-country, you will rarely need to stop for longer than a bathroom break and a cup of coffee.

Aside from FSD the rest of the car is nicely designed. I like the flush exterior door handles. The headlights are pixel-based, so when you drive with high beams on and come up behind another car, the pixels aimed at that car turn off while keeping the rest on, so you don’t blind the driver in front. Neat.

A few negatives. Tesla reliability is good but not great; Consumer Reports ranks Tesla 9th among brands. Despite the safety benefits of FSD, Teslas aren’t cheaper to insure than other similarly priced cars, largely I think because repair costs are not low. (Tesla’s own insurance gives lower rates for FSD miles and might be cheaper for me. I had my other car and an umbrella policy with another insurer so I didn’t switch, but I might.) I do find the pure electronic approach a bit much at times–must I really open the glove compartment verbally? Do those nice door handles only work when the battery is working?

Bottom line: FSD is revolutionary–a step change in what it means to drive. I don’t think any other car at a similar price comes close. It’s the best car I have ever owned.

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