Yup, sales are tragic on the CT6. It's still a great work of engineering. It's made of aerospace style webbed castings, adhesive bonding, aluminum, composites, and some high strength steel. It handles better than most cars that weigh 1,000 lb less. Very sure footed. It feels like a small sport sedan of similar price. The tech goodies are just fluff. It's the chassis and control software that make the car what it is. It's a true hotrod and it's not even that fast. But seriously, besides me, who wants a full sized sports car?
But... The CT6 Hybrid is heavily flawed:
The trunk is puny. And there is no pass-through. This is because they put the 18.4kWh battery where the back of the rear seats are. This also make it feel arse heavy when you try to slalom it. As good as the CT6 Platinum is, the Hybrid is seriously average in handling. They could not put the AWS, AWD, or magnetic suspension in it due to where the battery was placed. And to add insult to injury, they put the 2.0L Turbo in the nose, but it's RWD only.
You also lose the Supercruise, you lose the nice rear reclining massage seats, and the power privacy curtain. And the list gets longer.
It can be responsive. Sometimes. Acceleration in unpredictable.
We actually went to buy the Hybrid, and left with the Platinum instead. Same price at the time, but the 404hp TT is in nearly every way the better performance and luxury car.
BUT... There is not a better PHEV that I know of than the CT6 Hybrid. If you turn off the nannies and set it from stun to kill, it will roast the tires from a light. It runs the quarter mile in under 14 flat and over 100mph. It's speed limited to 152 mph like the Platinum is.
While the ATS-V and CTS-V are certainly quicker and faster, (there is a CT6-V but I have not driven it yet, 550? HP V8 TT) the CT6 has the better behaved chassis and it's easier to drive at it's limits with the nannys turned off. On a tight course with equal tires, it would probably be: CT6-V>ATS-V>CT6 Platinum>CTS-V but it would be a close race. On an open track? The CTS-V simply flies down the track and has the brakes to match.