> Is there anything FreeBSD can do that, say, Debian cannot?
Yes. Emulate traffic latency using IPFW and dummynet[^1]. There is no Linux (or OpenBSD, NetBSD) counterpart.
The ZFS implementation is less buggy.
You can emulate latency, packet errors, etc using netem tc [0] on Linux.
> The ZFS implementation is less buggy.
FreeBSD and Linux have been using the same implementation of ZFS for years.
What I really want is the Windows tool for that. Can't call it equivalent, because clunsy is way superior.
That is not really accurate? Linux traffic control (tc, [0]) exists since Kernel 2.2. It can introduce traffic latency and a few other network conditions, like packet loss.
[0]: https://www.man7.org/linux/man-pages/man8/tc.8.html