raises a hand In the early 2000s, I was in the hosting business, and we started using UML (user-mode-linux), then vserver and openvz. When Xen came around, we

raises a hand In the early 2000s, I was in the hosting business, and we started using UML (user-mode-linux), then vserver and openvz. When Xen came around, we switched to that, because it made more sense for us (and for our customers): more control, more "this is your machine" feeling. "Yes, but containers are better because they are lightweight!" Of course, but this idea was pointless back then, because people who wanted really lightweight things went to shared hosting (and for massive PHP hosting, containers can't beat a single Apache instance serving tens of thousands of vhosts; at least not yet). Maybe (maybe!) things changed with the rise of stacks like Python/Ruby/Node.js/etc for which there are no cheap shared hosting solutions like there is for PHP. Then containers are obviously cheaper than running your own VPS, and easier to setup (and isolate) than shared hosting on a single box.