I have adaptive and Eibach said the kit is for an M50.@Techwhiz1 certainly has adaptive on his M50.
I also have the TÜV certification for the spring kit for the car. ACS also has a kit for adaptive suspension and it's just springs and links. They also have the TÜV certification.
It still rides well. Sport is a little stiffer, but that's to be expected. Turn in is better and the car feels really solid.
I exclusively drive in sport mode. Why?
Because I'm coming from a bunch of M cars but my last was a 335i on B8's and M-Sport springs. I like the way it feels in sport mode.
I set the individual options for sport suspension and steering when I picked up the car and never looked back.
2023 M50 - Tanzanite over tartufo full individual leather, 20" wheels, fully loaded.