FreeBSD is not really curious about being as portable as possible, I think. And it is somewhat larger, indeed, so it's not quite as easy to support more platforms.
I mean, are we surprised? Linux has on the order of millions times more users and funds (probably not developers though, but who knows). Thus, if there is any financial viability of a port I am certainly expecting Linux to "move" first. Rather, I am impressed that OpenBSD and NetBSD are keeping up as well as they do.
