For what it's worth, I made the same mistake and have since discovered that ZFS on Linux is a smooth experience. Raided a pair of SSDs and now enjoy a (single) real command line and native docker containers.
This is for a home setup for sharing the family media file collection with the devices on the local network. Having the GUI just makes it simpler. I also own a FreeNAS mini so...along with a few TrueNAS at work.
The 9.x GUI is still the default.
Thank you. Since that is the case I upgraded. Seems to work fine. The new GUI is much less of a train wreck then the Coral one. It seem responsive. I will play with it for awhile and see...