What usage this article is talking about? For a server? For a desktop environment? For servers, me and my colleagues use Linux, and not being able to use Docke

What usage this article is talking about? For a server? For a desktop environment? For servers, me and my colleagues use Linux, and not being able to use Docker is a tough call, our workflow is very Docker-centered. I know that Jails exist, but it's not just about containment, it's about packaging, building and deploying too, and having ready-made tools (and a lot of existing Dockerfiles) for that. For desktop, I use macOS, and I'm not willing to change if it worsens the experience, which I suspect it will do. I wonder what would be the killer use for FreeBSD today? I'd be eager to try, since I'm eager to try all kinds of stuff, but I fail to find any place I could easily stray from my current OS combination.