It's hard to take you seriously with your statements like "the designers are on crack". Also the brain has worked very well for many years. It might not compare to modern suspension but it has been successful. I'd be curious to try the fox live valve system, but I'd imagine that is what the epic is waiting for.Non of that stuff works. Regardless of how reactive it is, it just adds more valving and seals ruining small bump sensitivity in the process. The reason people run FS for XC is (or should be) small bump performance for climbing and cornering traction.
I've spent some time on the Lapierre with the Fox active system. It's garbage. As was the Camber with the Brain.
Bikes are so efficient these days with 1X drive trains and optimized anti-squat that active damping wouldn't be worth it for me even if it did work. I'd swap the extra weight of it for a dropper anytime. Real world advantage with faster descending and lower fatigue. The only reason I see having anything other than simple passive suspension is a remote lock if your races have 1-2km asphalt starts.
And the LaPierre Ei system uses Rock Shox, not Fox.