To be honest most of your questions' answers are on the page. Let me answer on them, if you don't bother reading the page :) 1. It is written on the given webs

To be honest most of your questions' answers are on the page. Let me answer on them, if you don't bother reading the page :) 1. It is written on the given website: Centos 8.2 and Ubuntu 20.04 2. As many as 5U server can fit. Each drive is 8TB in passthru mode to your VM. 3. I think they are willing to work with users who know what is ZFS. At least for now. 4. Because it's your box. Do whatever you want. 5. Agree with you on that.