>I love ZFS and go to great lengths to run it everywhere on Linux, but the last time I tried to use it on macOS it was nowhere near usable.
I've run ZFS full time on my production and personal use Macs continuously for 11 years now. Of course needs and use cases vary, but I'm genuinely curious what did you find "nowhere near usable"? There are definitely rough edges depending on how you push it, but I think it hit all the core usability criteria once spotlight support was added and became stable (a lot of Mac functionality depends on that, before then it was a lot more limited). That was many, many years ago though.
I've run ZFS full time on my production and personal use Macs continuously for 11 years now. Of course needs and use cases vary, but I'm genuinely curious what did you find "nowhere near usable"? There are definitely rough edges depending on how you push it, but I think it hit all the core usability criteria once spotlight support was added and became stable (a lot of Mac functionality depends on that, before then it was a lot more limited). That was many, many years ago though.