Mileage may vary
My experience with Corral wasn't completely flawless, but I am still running it. It is a bit hardware heavy and my kit is out of date by most standards (HP NL40). I did have to start with a fresh load of my system due to the upgrade process hanging. Not really a big deal as I only had a couple SMB shares and one ISCSI mount.
SMB was broken in the first couple patches, but I have not had a problem since 10.0.4. The only other major issue I have is that I have a 2 port PCI-E Intel Gigabit card which is no longer recognized. It worked under 9.10. I have a 3rd built in NIC which works fine. I think the VM/Docker add on is the major feature I do not want to lose at this point. I am running PLEX in a container and it works fine provided it doesnt try to transcode the CPU in my freenas box is just too weak for that. Otherwise as of 10.0.4 its functional and working for me all the ways I need it maybe after 9.10.3 and the first few patches come out ill move back but for now its basically stable and working well so I will keep running it.