Technology

Your speed is directly tied to how hard you're pressing the accelerator. You don't have to guess momentum. If you fully let go the the accelerator, your rate of deceleration is tied to how much you can regen. If the battery is too full, the regen brakes can't absorb as much (the metaphor I like is imagining a full piece of luggage, it's hard to jam it from 90 to 100% full) - so instead of slowing the car down and not being able to absorb the energy, it'll just not slow down as much so it doesn't give waste energy - - this is actually pretty dangerous, so now there is a setting so that in situations like this, the car will use the real brakes so that you have a consistent maximum deceleration when letting go of the accelerator.

If the computer crashes the screen goes black so you lose the speedometer. It even rarer now and reboots quickly but obviously if you have a first time passenger they're gonna freak out. The car still has a normal brake, you just never use it since you wanna max the regen. If you use the real brakes, and browse the energy consumption screen it'll let you know how much battery you've wasted by not using regen and, if you have the safety score enabled you will probably get shit on for driving unsafely (if you need to use the real brake this means you are exceeding the capacity of the regen brake so yeah you're doing something erratic) - in California, this safety score cannot be used against you for insurance rates.

Only the cyber truck is full drive by wire. Idk the extent of it but there should be "mechanical connections" in the other cars. There's also a mechanical door handle that damages the trim if you use it (tell your passengers how to properly open/close doors)

Don't test drive unless you have the money to buy, lol. I already kinda knew I was gonna get one (I had just gotten hit by a drunk driver and used it as a catalyst to upgrade since I really wanted the FSD), but I was sold on the instant torque and the one pedal driving. You just envision yourself wanting to pass someone on the freeway, and the other dude doesn't stand a chance. It's awesome.