Would it be correct to say that OpenBSD is far more of a unified approach to kernel and userland development than GNU/Linux? As in, both ship as one unit, end-to-end, instead of interchangeable modules that make up GNU's ecosystem?
BSD = kernel + userland
Maybe it'll finally scratch the ultimate nerdy OS itch.
Probably not though.
It's much simpler than you represent.
There are only 4 real trees here:
* FreeBSD
* NetBSD
* OpenBSD
* Dragonfly BSD
In very approximate order, and I suspect that there are (wild approximation) half as many users for each step down the list.
One estimate I've seen is that there are ~7K users of openBSD, in total, worldwide.
There are a few distros of FreeBSD. None of the others have distros, AFAIK. PC-BSD was a FreeBSD distro. iXsystems acquired it, turned it into TrueOS, and then killed it 4Y ago.