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Possibly early 90 algorithms were flawed?
Sounds like more government math to me. I'll stick with science.
Not flawed. They were doing their testing in the 90s with cars that had not seen much evolution since the 80s or earlier. Which, if they had ABS, were probably not the best systems available.
The different ABS generations were quite simple - first the number of channels (the first cheaper versions of the real deal had one channel for both rear wheels, meaning if any of the rear wheels locked both were released. Fiat's first ABS in the 80s was called the antiskid, which was smartly using just two channels, diagonally. One monitoring front left and rear right, the other monitoring front right and rear left. If any of the fronts locked, both it and its diagonally opposed rear were unlocked. If any of the rears locked - its diagonally opposed front was released. Helped with stability, and was inexpensive and efficient.
Except - the Italians preferred not to account for the case where you'd do an emergency braking when someone comes in your lane from the opposite direction on a two way road. You jump to the soft shoulder, your two right wheels bite the dust and wheeee... both front right and rear right wheels start to slip, and each one unlocks, errr, its diagonal opposite... SWEET !!!
Then, there was the mechanical modulation. The electronics and algorithms were quite smart from the very beginning. It's just that the modulators would be modulating the brakes (squeeze-release) a few times per second.
1st gen (MBenz & Bosch) was about 2-3 times per second, early 80s.
2nd gen (Bosch 2, Delco) was 4-6 times per second - 80s, early 90s.
3rd gen (Bosch, Teves), was 10-15 times per second. That's when it surpassed humans. Mid 90s to early 2000s.
4rd gen is 15-20. Till 2010-ish
5th gen is around 40 times per second. That's mostly 2010 and up.
Motorcycle & racing ABS systems (when allowed) can go up to 100 times per second.
PS: Speaking of acceleration: The only people who can accelerate better with manual transmissions are automotive journalists, press drivers and factory testers. They all have in common the fact that they don't pay for repairs. A real test sequence with these usually ends up with at least a burnt clutch, not to mention funky driveline adventures.
Given enough power, CVTs accelerate the best, all things considered. It's just that you can't shake the feeling of driving a Cuisinart.
Snowmobile racing had 0-60mph acceleration times in the 2 seconds range in the 80s. Nowadays the record in Canada is I believe 1.1 seconds. They've been all-in on CVTs for decades.