Today, GM's Super Cruise system, which is capable of autonomously controlling steering, braking, and acceleration during on highway commutes, is available only in the premium Cadillac CT6 sedan.

That's set to change soon, and not just because Cadillac is axing the CT6. During GM's fourth-quarter earnings call earlier in the week, GM President Mark Reuss revealed that the system will be extended to a total of 22 nameplates by 2023, starting with the Cadillac Escalade, CT4, and CT5 before expanding to other General Motors brands. The high-tech semi-autonomous driving system is similar to Tesla's Autopilot and Nissan's ProPilot Assist, keeping the vehicle centered in its lane and controlling its pace automatically during normal highway driving.

Despite the low sales numbers of the CT6, Super Cruise has been something of a hit, making its way into a third of all CT6 sedans sold and racking up roughly 75,000 miles nationwide every week. GM says that 85 percent of owners with CT6 sedans equipped with Super Cruise say they would either prefer or only consider a car equipped with the feature.

On average, customers use Super Cruise about half the time that it's available. The system relies on onboard cameras to read lane markers, among other sensing equipment, and it only functions on pre-mapped stretches of road, so it can't be operated all of the time.

Moving forward, the system itself will grow to incorporate automated lane changing; presumably, all one will need to do is activate their turn signal in order to initiate a computer-controlled lane change.

GM's Super Cruise has been slow to roll out, the company says, because it was designed to integrate into a new digital platform, which is being worked into new vehicles as they are redesigned. After its expansion to the Cadillac Escalade, CT4, and CT5, Super Cruise will land in an additional seven nameplates next year, and another twelve between 2022 and 2023.