Coherency, security, stability, ZFS... Perfect on a server (e.g. a VPS), may not be as good as a desktop or as something to run on a laptop (depending on hardware).
My only sort of complaint in regards to FreeBSD is actually ZFS. Not that it's not fantastic, or that it shouldn't be there. ZFS does however clearly comes from Solaris, and there have been no effort to make the ZFS command line tools feel more BSD like.
Changing the tooling around ZFS probably isn't a great idea, but coherency has clearly taken a backseat to features in this case.
Right, because ZFS is a foreign piece of software that runs on other operating systems. At that point you are better off keeping those tools coherent with other ZFS implementations. This is a good compromise.
There's a modest amount of precedent for this kind of thing.
0: lvcreate(1M) from HP-UX 11i https://nixdoc.net/man-pages/HP-UX/man1/lvcreate.1m.html
NB: Not on OpenBSD.
What does this refer to in this context?
If you install everything from sources directly, or directly from upstream vendors, you may get inconsistencies, but if you install everything from your Linux distribution, you should get reasonable consistency, just as if you install everything from your BSD distribution.
ps: another instance, albeit not a BSD strength either, would be data format, every output is different, I, like a few people too wanted some json as pivot representation to cut the thousands of papercuts, that kind of uniformity is what I expect from "system"
ps --libxo json