Purchasing a car with a Bluetooth audio package. When I was first looking at my current DD Bluetooth audio wasn't a make or break it for me. I saw it as nothing more than a nice little bonus, not really something that was really part of my calculus on whether or not I should choose one vehicle over another. It has been amazing and I can't imagine driving a car without it. Hands-free audio for phone calls and no AUX cables for my podcasts or music. Truly, a wonderful piece of tech. Super convenient and also makes me a safer driver!
Of course, phones, computer, a good keyboard, and all of that are really useful pieces of tech. I ignored all of those because those are, in my mind, necessary. Picking one of those almost seems like cheating.