gramio

Regardless of what issue you are experiencing, what you should try if you are stuck is remove the container, then use CA cleaner plugin to completely remove configs (or do it manually if you are familiar with your file system). Reinstall the container from Apps and you should be back to a working state. As mentioned several times here, there seems to be a database issue and the python code clearly can't handle some exceptions gracefully. None of that really matters if you only want to get to a working state.

Back to the og question in the thread, before you start dismissing zfs as useless and not being the Unraid way consider this. I recently upgraded a config that is a simple NAS media server ( 3 identical hdds, one setup as parity) and cache with redundancy i.e. 2 nvms setup to mirror each other. The only slightly unusual feature of the system is 64gb of ram which is more than most but definitely just a nice to have and not a necessary feature. Moved the cache drives from btrfs to zfs which took some time but definitely not a hard process. The new setup does use RAM ( 1/8 of the total available so 8gb in this case) but what you gain from it is hard to believe. Nothing has changed in the hardware config of the system but the whole system is faster to respond and some workflows such as moving data from cache to the array are substantially faster (some cases are 6-7x faster). Keep in mind that none of the Unraid principles have changed and from a user pov this is the same system. You also gain a much better snapshot management but forget about that for a sec because that's changing user/admin behaviour. So if you really want to know why you should care about ZFS, the answer is speed. If you are stuck on 16gb of ram, it's definitely not for you. But if you can spare some RAM, you might as well consider moving at least your cache to zfs.

Not to split hairs here but, most NAS is based on the principle of data duplication so you always have the space that you need to move from one FS to another. It just takes time to move the data around. That said, if questionbot doesn't see the point of ZFS then clearly you are not the usecase that Unraid is solving for. Keep using what you have and don't worry about ZFS. It's quite clear that this is another option and it's not replacing any of the existing choices for FS.