I'm using Zero XI edition for some time now and I'm pretty happy with it. But recently while I was doing a troubleshooting with a PHP app, I have found that all the software bundled in Zero XI server (e.g. Apache, PHP...) is using the 32 bits version and not the 64 bits one.
I was unable to find any 64 bits version of Zero XI server. I wonder why we don't have one. 64 bits processors are mainstream since many years now. So why using 32 bits ??