While the "better" security than Linux argument is weak, the FreeBSD/OpenBSD OS network packet handling is extremely good (common OS for routers etc.) =3
I ended up switching from FreeBSD to Linux twice (TrueNAS CORE -> TrueNAS SCALE, opnSense -> OpenWrt) due to poor network performance on FreeBSD. Could just never get 10 Gbps throughput on FreeBSD, whereas Linux on the same hardware was fine. Across Intel and Mellanox NICs, so not a specific driver issue.
Usually Linux can enable a vendors direct packet handling driver as a closed source firmware that bypasses the kernel almost completely once the user connection is setup. That was the most economical way to handle several SFP-DD Transceivers at saturation in a normal host. ymmv
There are probably better solutions around these days. =3
