Ice isn't a necessity, there are lots of builds that can use ice or no ice at all. Very simple, really. Just use water to push the cactus into a hopper and you're done. But packed icejust gets the cactus to your hopper faster and smoother, so a 2 sign isn't that bad. But some builds may use packed ice as well so might as well add the 64 packed ice sign. So in the end, I still agree, but not for the same reason.