I found the post from October, 2010. I don't remember it when it came out.
I run two HA servers in a collective on two virtual machines on the same host. I set these up just a few months ago
It was nice to have one file I could point my virutal CD drive at and build both servers.
I understand that, if the cost is extensive, then it may not be worth it to provide this option. There is always a way to work around a limitation. The October post asked how many people would miss it. It looks like about 22% preferred. There was no reasoning given for dropping this option.
Is there any chance there will be a new release of the ISO?