Others don't sell driverless features yet but they do sell L2 ADAS or Tesla Autopilot on freeway equivalent.
For 2020 Cadillac CT6,
Super Cruise became standard on higher trims.
Now,
Super Cruise costs $2,500 in 2021 Cadillac Escalade Premium Luxury Platinum and Sport Platinum while the basic ADAS (mainly Smart Cruise, Reverse Automatic Braking, Enhanced Automatic Emergency Braking...) is included ($3,650 for lower models or $6,150 total).
There's a $25/month connectivity fee after
3 years of a free trial but the Smart Cruise and Autosteer still work if you don't pay after 3 years but you do lose updated maps and GPS corrections for hands-free driving.