

NetBSD is more portable than Linux and supports a lot of CPU architectures. OpenBSD is secure by default. I think the BSD’S have jails, which are better containers, but I do not know much about it.
For desktop daily use, it only matters if you really want that Unix taste.

Just want to let you know from my canoebooted laptop that I run a 100% “free as in freedom” OS (trisquel GNU/Linux). Also you have convinced me about striving for a goal instead of doing it perfectly, which is not possible. Well said.