Yes, I think that’s a rewording of what I said. As you point out, the word “server” in the title refers to a role, not to a particular device. But that role is,

Yes, I think that’s a rewording of what I said. As you point out, the word “server” in the title refers to a role, not to a particular device. But that role is, for the writer, something that is already known, so it comes first. This theme-followed-by-rheme is only a tendency, not a hard and fast rule. In casual conversation, people do tend to structure their sentences that way without even thinking about it. In writing or translation, though, a sentence might need to contain a lot of different elements and, in the process of arranging them, a writer might put the rheme before the theme. Readers might think the resulting sentence seems a bit awkward, but they probably won’t be able to pin down the reason. This “My server is a phone now” title was an exception, because (as the comments below show) some people were confused enough to remark on it.