Good point, but I wasn't implying that the "A" in ACID stands for Availability (sorry if that was unclear), but that what people dealing with traditional system

Good point, but I wasn't implying that the "A" in ACID stands for Availability (sorry if that was unclear), but that what people dealing with traditional systems (build on ACID) mean when they speak about "Availability". For example it may mean a master-slave system with an automatic failover, which is rather different from what Availability means in CAP.