Automatic high beams
How widespread are they? The basic version is pretty common, and more advanced versions are starting to roll out. It varies by manufacturer, but look for the icon with an "A" by your headlight controls.
What they are: When it comes to anticipating extremely dark conditions, your car is probably smarter than you are. Now that automatic headlights are a mainstream feature, most cars come equipped with a sensor that detects darkness. The ones with LED headlights have additional sensors that can pick up on oncoming cars and respond to them, because if you don't blind them, they're less likely to hit you.
Will you use them every day? Definitely. It's a relief to know that your car is looking out for you.
Traffic jam assist
How widespread is it? It's evolved from a high-dollar option on luxury vehicles to become more readily available on affordable sedans, from the 2016 Honda Civic on up.
What it is: The best way to relieve the stress of bumper-to-bumper traffic? Let your car do the work. For cars that are equipped with adaptive cruise control, traffic jam assist is a game-changing feature that will accelerate, brake, and steer for you. Set the cruise control to a comfortable highway speed, and let the car modulate the distance between cars and keep you in lane.
Will you use it every day? Yep. Whether you're stuck on some freeway hellscape like the 405 or have a more scenic route home, there are plenty of uses for this feature.