" Remember when ABS was first introduced in trucks, it was rear only."
Your observation I believe is correct, but your conclusion I likely disagree with.
ABS rear only is more likely because the difference in weight and braking characteristics between an empty truck and a fully loaded one was almost beyond the driver's skills of a even competent driver, in all conditions, wet or dry. ABS was a logical solution.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
