I use One Ethanol R. It's 90-95% ethanol, not street legal at all, a huge pain to get the car to start, and 117-120 octane (usually). It takes a ton of this fuel to make a 1/4 mile pass, expensive, and completely impractical for most applications.
BMWs (including our Supras) already have the high-speed CAN encrypted. The trans communicates over FlexRay, which is why we're so fucking boned on trans tuning.
Edit: This is also why we don't have MoTEC yet.
I'm just surprised anyone cars about the temperature of the other side of the car. If you want hot/cold air blown on you.. it'll blow hot/cold air on you.
If you don't have a passenger, who gives a fuck. If you do have a passenger, they can pick their own.. ¯\_(ツ)_/¯
Sure, but then you gotta buy another house, right? And in a seller's market, you're going to get half of what you have. That === trapped. Unless of course, you take the few hundred k, and rent ;).
Like I said above, it's different for everyone. Homeownership, as @nosavingthrow mentioned is...