*What's the lesson to learn here?

A big problem is this: I can have zb with a status of degraded for a while after doing some things, but it soon shows up as suspended after having it mounted for a while and doing things for a few minutes. I have seen this behavior on other HDD(s). Suspended = cannot do any file operations. Did some research, and saw that this guy has a similar issue: https://old.reddit.com/r/zfs/comments/wpvzs2/need_help_with_inputoutput_error_on_zfs_dataset/

Making a backup of ~4 TB of torrents was like a waste of time because zb died like that. I only have ~70% of those torrents now because I deleted some after copying them into zb. What was the other 4.66 TB? Don't entirely know. Some of it was blocks synced in from other repos.