It's not really a big deal for me, updating and rebooting takes all of 4 min on my server, so prefer to update and ensure issues are mitigated.

If you're running something earlier than 6.12.5 and using ZFS, there is a potential for data loss due to a bug that can occur on any ZFS filesystem (not just within unRAID). Patching to at least 6.12.5 mitigates that bug and 6.12.6 solves it, so delaying a couple of weeks could put data at risk. Not advised.