We are from a SmartOS background so of course we are biased to SmartOS, but there are software packages that work better on BSD, and it does have some interesting potential with wider hardware support.
Freebsd vmadm has jails, and lx jail support right now. We are looking at adding bhyve. It should not be a large task as we took a jail in a jail approach in order to have vnet support but still lock down in inner jail. This made adding lx jails a minimal task, and I expect bhyve to be no different.
Thanks for the compliments! We love FiFo and hope you do too!