OpenVZ is dated 2005 in the document, which makes FreeBSD look a bit alone back in 2000, but that's not really accurate. OpenVZ was just a re-branding of Virtuo

OpenVZ is dated 2005 in the document, which makes FreeBSD look a bit alone back in 2000, but that's not really accurate. OpenVZ was just a re-branding of Virtuozzo, which was released in 2000, in an effort to upstream it. Virtuzzo got really popular quickly in the cheap webhosting market, as a more secure and powerful alternative to shared hosting. I worked with it a lot in the early 2000s. I don't think they ever outgrew that market however, and when "real" virtualization came with VMware and friends, that's where all the money went. It's only fair to mention where it really started in the Linux world. (Also a bit funny to see the pendulum of tech swing back again. It's about time!)