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.

NetBSD and OpenBSD support “old” hardware notably longer than Linux does though. OpenBSD having dropped the VAX is not that long ago.