Oracle VM VirtualBox is a virtualization solution which is (now) supposedly targeted at "enterprise as well as home users" according to its web site.
In the past, we've been mostly hostile to VirtualBox questions since the perception is that it's rarely used and mostly unsuited to professional and server environments.
But people are attempting to use it as such anyway, and sometimes they come here to ask their questions.
This question is motivated in part by a recently closed question that was flagged for reopening, in which a user was running a Windows Server lab environment on VirtualBox and having issues with the Server 2012 guest.
Obviously questions about using VirtualBox for home/desktop virtualization don't really belong here, but do they belong here when it's being used for professional purposes (whether it's a good practice or not)? When should such questions be closed, or left open with a "don't use VirtualBox" comment, or answered?