I'll sit partially corrected.
while I know that most cars have electronic brake force distribution - IE instead of just an on and off of the brake line hydraulc pressue to each individual caliper - the newer systems have a variance range (think 100%, 80-40%, 20-0) so as to gently apply one wheel and fully apply the opposite.
this is helps fine tune braking in various conditions and it helps find tune stability assistance programs. the newer explorers definitely have this.
but pulsing in the rain - it seems Cadillac and BMW are the only 2 that readily come up as still advertising this feature - it is tied to if the wipers are on, or if the car has rain sense (for both bimmer and caddy). it requires that cruise be off, the car is over 20mph, and throttle position is above a threshold. I don't see audi nor mercedes or anyone else still advertise this. No other GM product advertises it, and no ford product does wither. There is mention that jeep grand cherokee's might do something similar with similar requirements.
So I suppose some companies did implement this and it is limited in use, and strict requirements. Note none of the systems appear to be active upon cruise. Also I see where the GM ABS system new software (some cars built after 11) have in the algorithm cases for damp rotors and distribution and timing changes tuned for those cases. IE not so much dry the rotors, but rather, if the brake reaction after X miliseconds isn't _______ or >, then do __________ and ____________ and test again.
I have to assume other systems do something similar.
