We run ZFS for a system at work on linux. Yea, it isn't as seamless and nice on FreeBSD. Only reason we aren't running FreeBSD is the application that needs to access that storage is .NET, and no .NET support for FreeBSD.
Will check this out! I knew there was a group who had a version working, but it wasn't upstreamed and last I check was still stuck at .NET 5. While I would like to migrate from Debian to FreeBSD, probably won't get management to okay that with current services, but future one, maybe!
Makes sense, out of curiosity have you tried the linux jails that Bastille offers? [0]
They're still considered experimental so I wouldn't run it for production but I wonder how well .Net would run in one. The whole container could be a zfs dataset, which would be interesting.