This is probably going to sound outlandish to the majority, but I take it a step further and don't trust any car (+driver), period. Including drivers with massive amounts of experience or skill (even the best have failed spectacularly).

So what do I do instead? I mostly cycle and ride where motorists don't drive and set the largest possible safety margins. I recognise this is not immediately practical for everyone but I'm fortunately set up in the right place with the right knowledge to achieve this.

So far this year, I've been in a car four times, a train twice and a plane twice. Musk is pushing for a world where everyone is dependent upon a form of low-occupancy heavy motorised transportation (including wanting to reinvent the train). Naturally, I recoil at this and so should more. More cars will never save the world.

We already live in that world (or country, at least). Your situation is an outlier, unfortunately. I'd personally rather have those cars be electric than burning fossil fuels, and if anyone can reinvent mass transit and make it available to people outside of major cities I'd happily take a train.

If you can't trust software, then how do you handle money? Cash only? No online purchases?

I pick my battles. That area doesn't worry me much.

So you're trading off the theoretical unsafeness of software (how many car accidents have been caused by faulty software?) against the huge improvements in crash safety (engineered crumple zones, AEB, etc) in the past 25 years