I understand and I agree from an experience point of view it felt very unstable on debian and proxmox that is debian based.

I wanted to share this experience too as a warning to users investing time and money and possibly hitting instabilities that can cause raid problems and data loss. Don't know why my comment got downvoted, if I knew about this I would have handled things differently.

I usually recovered the pool thanks to other disks being fine, but beside zfs being super cool in terms of features and flexibility at the beginning it actually felt unreliable and I would not suggest it neither!

as mentioned it is probably more stable on other families but I didnt experience that yet.

would freebsd be the most reliable? or which one would have the most reliable zfs module state?

do other solutions like unraid or truenas or similar use zfs the background?